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Unaudited Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Cash flows from operating activities:    
Net loss $ (9,532) $ (28,171)
Adjustments to reconcile net loss to net cash used in operations:    
Depreciation and amortization 3,360 4,104
Stock-based compensation expense 3,608 3,492
Provision for excess and obsolete inventory 1,536 1,247
Deferred income taxes 3 65
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability 3,052 (340)
China dissolution 0 1,921
Other non-cash items 495 185
Unrealized foreign exchange loss on cash and cash equivalents (1) (3)
Changes in operating asset and liability accounts:    
Accounts receivable 5,945 2,738
Inventory (8,737) (16,324)
Prepaid expenses and other assets 7,139 (165)
Accounts payable and accrued expenses (15,859) 2,565
Deferred revenue 8,894 11,619
Net cash used in operating activities (97) (17,067)
Cash flows from investing activities:    
Purchase of property, plant and equipment (635) (970)
Change in other assets (8) (194)
Net cash used in investing activities (643) (1,164)
Cash flows from financing activities:    
Repayment of debt (49) (56)
Proceeds from exercise of employee stock options and ESPP 136 127
Net cash provided by financing activities 87 71
Effect of exchange rate changes on cash 3 25
Net decrease in cash, cash equivalents and restricted cash (650) (18,135)
Cash, cash equivalents and restricted cash at beginning of period 25,675 49,486
Cash, cash equivalents and restricted cash at end of period 25,025 31,351
Supplemental schedule of cash flow information:    
Cash paid for income taxes, net of refunds 263 280
Non-cash investing and financing activities    
Issuance of common stock to settle contingent consideration 3,092 0
Issuance of common stock to settle liabilities $ 467 $ 476