Balance at

Charged to

Charged to

Balance at

Beginning

Costs and

Other

End of

Description

of Period

Expenses

Accounts

Deductions

Period

Year ended March 31, 2017

Reserves deducted from the asset to which they apply:

Reserve for doubtful accounts receivable

$

91

$

91

$

—

$

(14

)

$

168

Reserves included in the balance sheet caption "accrued

   expenses"

Product warranty liability

$

686

$

106

$

—

$

(254

)

$

538

Reserves included in the balance sheet caption "accrued

   compensation"

Restructuring reserve

$

74

$

630

$

—

$

(584

)

$

120

Year ended March 31, 2016

Reserves deducted from the asset to which they apply:

Reserve for doubtful accounts receivable

$

62

$

38

$

—

$

(9

)

$

91

Reserves included in the balance sheet caption "accrued

   expenses"

Product warranty liability

$

653

$

336

$

—

$

(303

)

$

686

Reserves included in the balance sheet caption "accrued

   compensation"

Restructuring reserve

$

1,718

$

(3

)

$

—

$

(1,641

)

$

74

Year ended March 31, 2015

Reserves deducted from the asset to which they apply:

Reserve for doubtful accounts receivable

$

46

$

24

$

—

$

(8

)

$

62

Reserves included in the balance sheet caption "accrued

   expenses"

Product warranty liability

$

308

$

930

$

—

$

(585

)

$

653

Reserves included in the balance sheet caption "accrued

   compensation"

Restructuring reserve

$

—

$

1,718

$

—

$

—

$

1,718