CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net loss	$ (15,905)	$ (15,650)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	6,933	6,400
Accretion of debt in interest expense	522	486
Current expected credit losses	489	326
Provision for obsolete inventory	88	529
Stock-based compensation	3,055	3,536
Adjustment to contingent consideration liability	(5,200)	0
Changes in operating assets and liabilities:
Accounts receivable	(7,034)	(4,868)
Inventories	5,051	(6,338)
Other current assets	(2,512)	(1,849)
Other assets	752	(1,353)
Accounts payable	4,063	1,906
Accrued salaries and benefits	(7,647)	(4,511)
Accrued expenses	1,067	(1,117)
Customer deposits and deferred service revenue	(343)	1,651
Customers payable	216	0
Other long-term liabilities	(343)	(346)
Net cash used in operating activities	(16,748)	(21,198)
Cash flows from investing activities:
Cash paid for acquisitions, net of cash acquired	0	(1,212)
Capital expenditures	(823)	(280)
Capitalization of software costs	(481)	(1,568)
Purchase of held to maturity investments	(463)	0
Net cash used in investing activities	(1,767)	(3,060)
Cash flows from financing activities:
Principal payments of long-term debt	0	(173)
Treasury stock acquired from employees upon vesting or forfeiture of restricted stock	(2,478)	(2,051)
Proceeds from exercise of stock options	52	813
Net cash used in financing activities	(2,426)	(1,411)
Effect of exchange rate changes on cash and cash equivalents	(512)	457
Net decrease in cash and cash equivalents and cash held on behalf of customers	(21,453)	(25,212)
Cash and cash equivalents and cash held on behalf of customers at beginning of period	77,533	188,419
Cash and cash equivalents and cash held on behalf of customers at end of period	56,080	163,207
Reconciliation of cash and cash equivalents and cash held on behalf of customers
Cash and cash equivalents	48,659	163,207
Cash held on behalf of customers	7,421	0
Total cash and cash equivalents and cash held on behalf of customers	56,080	163,207
Supplemental disclosures of cash flow information:
Interest	0	9
Income taxes	507	0
Capitalized software recorded in accounts payable	776	13
Capital expenditures in accounts payable	$ 87	$ 73