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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Cash flows from operating activities:    
Net (loss) income $ (7,216) $ 7,540
Depreciation and amortization 6,981 6,609
Stock-based compensation 1,423 1,221
Amortization of debt issuance costs 83
Impairment loss on goodwill 13,819
Change in inventory reserve 2,120 (507)
Deferred income taxes (1,077) 418
Foreign currency adjustments (255) (17)
Gain on disposition of assets (116)
Adjustment to contingent consideration 300
Change in assets and liabilities, net of effects of acquisitions    
Accounts receivable, net 2,621 2,369
Inventories 1,414 97
Prepaid expenses and other (1,687) (1,094)
Accounts payable (139) 96
Accrued liabilities and taxes payable (1,751) (4,401)
Unearned revenues (442) (484)
Contingent consideration (905) (5,076)
Net cash provided by operating activities 15,173 6,771
Cash flows from investing activities:    
Acquisitions (15,433) (6,618)
Proceeds from sale of assets 1,133
Purchases of property, plant and equipment (2,540) (9,367)
Net cash used in investing activities (16,840) (15,985)
Cash flows from financing activities:    
Proceeds from the issuance of debt 11,000 11,500
Payments on debt (9,750) (3,750)
Dividends (1,807) (1,760)
Proceeds from the exercise of stock options 2,346 2,815
Net cash provided by financing activities 1,789 8,805
Effect of exchange rate changes on cash and cash equivalents (99) 119
Net increase (decrease) in cash and cash equivalents 23 (290)
Cash and cash equivalents at beginning of period 5,820 5,695
Cash and cash equivalents at end of period 5,843 5,405
Cash paid for:    
Income taxes 4,191 4,188
Interest 1,477 913
Supplemental non-cash activity:    
Contingent consideration as part of an acquisition $ 1,822