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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Cash flows from operating activities:      
Net income $ 1,871 $ 3,274 $ 1,778
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 25,068 17,660 12,990
Stock-based compensation 11,391 9,268 5,525
Non-cash interest and debt amortization 1,029 5,397 3,314
Amortization of step-up in inventory basis 7,462 (436) 8,502
Deferred taxes 128 (3,503) (1,971)
Other (534) 161 (13)
Cash provided by changes in operating assets and liabilities:      
Accounts receivable, net (6,752) (647) (1,665)
Inventories (1,045) 929 414
Prepaid expenses and other assets (3,606) 2,878 (432)
Accounts payable 1,370 967 (61)
Accrued liabilities and taxes payable 255 (317) (2,147)
Unearned revenues 2,586 1,442 754
Net cash provided by operating activities 39,223 37,073 26,988
Cash flows from investing activities:      
Acquisitions, net of cash acquired (300,793) 0 (184,102)
Purchases of property, plant and equipment (4,432) (1,992) (1,498)
Net cash (used in) investing activities (305,225) (1,992) (185,585)
Cash flows from financing activities:      
Proceeds from the issuance of debt 70,000 0 0
Payments of debt (21,000) 0 (23,000)
Dividends (3,339) (3,165) (2,722)
Proceeds from the exercise of stock options 7,152 4,426 4,945
Payments of contingent consideration (237) (304) (11)
Proceeds from the issuance of common stock, net 0 145,935 84,995
Proceeds from the issuance of convertible senior notes, net 0 0 172,500
Payment of debt issuance costs 0 (664) (5,430)
Net cash provided by financing activities 52,576 146,228 231,277
Effect of exchange rate changes on cash and cash equivalents (1,093) 1,176 (1,485)
Net (decrease) increase in cash and cash equivalents (214,519) 182,485 71,195
Cash and cash equivalents at beginning of period 263,865 81,380 10,185
Cash and cash equivalents at end of period 49,346 263,865 81,380
Cash paid for:      
Income taxes paid 3,048 1,367 2,634
Interest paid 2,762 2,372 1,627
Long-lived Assets Excluding Property, Plant and Equipment [Member]      
Cash flows from investing activities:      
Proceeds from the sale of assets $ 0 $ 0 $ 15