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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Cash flows from operating activities:    
Net income $ 6,419 $ 7,344
Depreciation and amortization 5,207 4,162
Stock-based compensation $ 1,001 776
Loss on disposition of assets $ 16
Deferred income taxes $ 128
Foreign currency adjustments 85 $ (169)
Change in assets and liabilities, net of effects of acquisitions    
Accounts receivable, net 72 (1,994)
Inventories, net (1,901) (3,340)
Prepaid expenses and other 40 538
Accounts payable 80 747
Accrued liabilities and taxes payable 710 (1,439)
Unearned revenues (118) $ (465)
Contingent consideration (1,770)
Net cash provided by operating activities 9,953 $ 6,176
Cash flows from investing activities:    
Acquisitions (23,199) (19,050)
Purchases of property, plant and equipment (6,291) (2,212)
Net cash used in investing activities (29,490) (21,262)
Cash flows from financing activities:    
Proceeds from the issuance of debt 25,000 23,000
Payments on debt (4,250) (11,500)
Dividends (1,724) (1,618)
Proceeds from the exercise of stock options 1,800 1,137
Net cash provided by financing activities 20,826 11,019
Effect of exchange rate changes on cash and cash equivalents (51) (81)
Net increase (decrease) in cash and cash equivalents 1,238 (4,148)
Cash and cash equivalents at beginning of period 2,034 5,575
Cash and cash equivalents at end of period 3,272 1,427
Cash paid for:    
Income taxes 3,375 2,789
Interest 563 354
Supplemental non-cash activity:    
Repayment of employee loans for stock options   24
Contingent consideration as part of an acquisition $ 9,541 $ 300