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Condensed Consolidated Statements of Operations and Retained Earnings (Unaudited) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2014
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Dec. 31, 2013
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| Income Statement [Abstract] | ||||
| Net sales | $ 33,646us-gaap_SalesRevenueNet | $ 23,385us-gaap_SalesRevenueNet | $ 97,714us-gaap_SalesRevenueNet | $ 76,131us-gaap_SalesRevenueNet |
| Cost of products sold | 23,543us-gaap_CostOfGoodsSold | 17,295us-gaap_CostOfGoodsSold | 68,695us-gaap_CostOfGoodsSold | 51,737us-gaap_CostOfGoodsSold |
| Gross profit | 10,103us-gaap_GrossProfit | 6,090us-gaap_GrossProfit | 29,019us-gaap_GrossProfit | 24,394us-gaap_GrossProfit |
| Other expenses and income: | ||||
| Selling, general and administrative | 4,424us-gaap_SellingGeneralAndAdministrativeExpense | 4,047us-gaap_SellingGeneralAndAdministrativeExpense | 13,413us-gaap_SellingGeneralAndAdministrativeExpense | 12,786us-gaap_SellingGeneralAndAdministrativeExpense |
| Selling, general and administrative - amortization | 59us-gaap_AmortizationOfIntangibleAssets | 55us-gaap_AmortizationOfIntangibleAssets | 171us-gaap_AmortizationOfIntangibleAssets | 168us-gaap_AmortizationOfIntangibleAssets |
| Interest income | (50)us-gaap_InvestmentIncomeInterest | (10)us-gaap_InvestmentIncomeInterest | (139)us-gaap_InvestmentIncomeInterest | (31)us-gaap_InvestmentIncomeInterest |
| Interest expense | 2us-gaap_InterestIncomeExpenseNonoperatingNet | (11)us-gaap_InterestIncomeExpenseNonoperatingNet | 8us-gaap_InterestIncomeExpenseNonoperatingNet | (2)us-gaap_InterestIncomeExpenseNonoperatingNet |
| Total other expenses and income | 4,435ghm_OtherExpensesAndIncome | 4,081ghm_OtherExpensesAndIncome | 13,453ghm_OtherExpensesAndIncome | 12,921ghm_OtherExpensesAndIncome |
| Income before provision for income taxes | 5,668us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 2,009us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 15,566us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 11,473us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest |
| Provision for income taxes | 1,676us-gaap_IncomeTaxExpenseBenefit | 578us-gaap_IncomeTaxExpenseBenefit | 4,996us-gaap_IncomeTaxExpenseBenefit | 3,645us-gaap_IncomeTaxExpenseBenefit |
| Net income | 3,992us-gaap_NetIncomeLoss | 1,431us-gaap_NetIncomeLoss | 10,570us-gaap_NetIncomeLoss | 7,828us-gaap_NetIncomeLoss |
| Retained earnings at beginning of period | 99,237us-gaap_RetainedEarningsAccumulatedDeficit | 90,426us-gaap_RetainedEarningsAccumulatedDeficit | 93,469us-gaap_RetainedEarningsAccumulatedDeficit | 84,632us-gaap_RetainedEarningsAccumulatedDeficit |
| Dividends | (405)us-gaap_DividendsCommonStockCash | (302)us-gaap_DividendsCommonStockCash | (1,215)us-gaap_DividendsCommonStockCash | (905)us-gaap_DividendsCommonStockCash |
| Retained earnings at end of period | $ 102,824us-gaap_RetainedEarningsAccumulatedDeficit | $ 91,555us-gaap_RetainedEarningsAccumulatedDeficit | $ 102,824us-gaap_RetainedEarningsAccumulatedDeficit | $ 91,555us-gaap_RetainedEarningsAccumulatedDeficit |
| Basic: | ||||
| Net income | $ 0.39us-gaap_EarningsPerShareBasic | $ 0.14us-gaap_EarningsPerShareBasic | $ 1.04us-gaap_EarningsPerShareBasic | $ 0.78us-gaap_EarningsPerShareBasic |
| Diluted: | ||||
| Net income | $ 0.39us-gaap_EarningsPerShareDiluted | $ 0.14us-gaap_EarningsPerShareDiluted | $ 1.04us-gaap_EarningsPerShareDiluted | $ 0.78us-gaap_EarningsPerShareDiluted |
| Weighted average common shares outstanding: | ||||
| Basic: | 10,127us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 10,070us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 10,119us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 10,063us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
| Diluted: | 10,149us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 10,107us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 10,142us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 10,099us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
| Dividends declared per share | $ 0.04us-gaap_CommonStockDividendsPerShareDeclared | $ 0.03us-gaap_CommonStockDividendsPerShareDeclared | $ 0.12us-gaap_CommonStockDividendsPerShareDeclared | $ 0.09us-gaap_CommonStockDividendsPerShareDeclared |
| X | ||||||||||
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- Definition
Total selling, general & administrative expenses and nonoperating income and expense. No definition available.
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| X | ||||||||||
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- Definition
The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Aggregate dividends declared during the period for each share of common stock outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Total costs related to goods produced and sold during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of paid and unpaid common stock dividends declared with the form of settlement in cash. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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| X | ||||||||||
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- Definition
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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| X | ||||||||||
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- Definition
Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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| X | ||||||||||
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- Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The net amount of nonoperating interest income (expense). No definition available.
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| X | ||||||||||
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- Definition
Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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| X | ||||||||||
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- Definition
The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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| X | ||||||||||
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- Definition
Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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