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Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Cash flows from operating activities:    
Net loss $ (10,087) $ (3,279)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:    
Depreciation 546 463
Loss on disposal of property and equipment 21 11
Amortization of intangible assets 3,004 629
Amortization of premium on investments, net 0 64
Stock-based compensation 4,049 2,564
Change in fair value of contingent consideration 2,040 0
Deferred tax liability (2,279) 6
Changes in operating assets and liabilities:    
Trade accounts receivable (4,848) 2,874
Inventory (6,261) 177
Prepaid expenses and other assets 371 (164)
Other assets 50 0
Accounts payable 1,817 (862)
Accrued compensation (781) 163
Accrued liabilities and other 1,214 843
Lease liabilities (26) 0
Deferred obligation under operating lease 0 215
Net cash provided by (used in) operating activities (11,170) 3,704
Cash flows from investing activities:    
Cash paid for acquisition, net of cash acquired (14,185) 0
Purchases of available-for-sale securities 0 (753)
Maturities of available-for-sale securities 0 22,366
Purchases of property and equipment (736) (727)
Net cash provided by (used in) investing activities (14,921) 20,886
Cash flows from financing activities:    
Repurchase of common stock (97) (608)
Proceeds from issuance of common stock, net 2,526 1,169
Net cash provided by financing activities 2,429 561
Net increase (decrease) in cash, cash equivalents and restricted cash (23,662) 25,151
Cash, cash equivalents, and restricted cash; beginning of period 38,348 13,197
Cash, cash equivalents, and restricted cash; end of period 14,686 38,348
Supplemental disclosure of cash flow information    
Interest paid 0 0
Taxes paid 153 164
Supplemental disclosure of non-cash investing and financing activities:    
Right-of-use assets recorded upon adoption of ASC 842 3,199 0
Leased liabilities recorded upon adoption of ASC 842 3,519 0
Accrual of property and equipment 4 2
Cash and cash equivalents and restricted cash 14,511 38,173
Restricted cash included in other assets 175 175
Total cash, cash equivalents, and restricted cash $ 14,686 $ 38,348