CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net loss	$ (18,227)	$ (19,886)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	8,870	4,537
Accretion of debt in interest expense	2,917	2,163
Current expected credit losses	922	978
Provision for obsolete inventory	511	1,439
Stock-based compensation	5,571	2,212
Loss on debt extinguishment	0	8,123
Deferred income tax	(12,360)	(4,408)
Changes in operating assets and liabilities, net of acquisition:
Accounts receivable	7,065	2,560
Inventories	(8,765)	(8,105)
Other current assets	(11,049)	260
Other assets	(1,525)	119
Accounts payable	4,933	(931)
Accrued salaries and benefits	(1,276)	(231)
Accrued expenses	(6,345)	(652)
Customer deposits and deferred service revenue	(3,901)	(2,438)
Other long-term liabilities	(399)	618
Net cash used in operating activities	(33,058)	(13,642)
Cash flows from investing activities:
Settlement of working capital for acquisitions	0	172
Cash paid for acquisition, net of cash acquired	(377,263)	0
Capital expenditures	(600)	(188)
Capitalization of software costs	(3,838)	(4,613)
Net cash used in investing activities	(381,701)	(4,629)
Cash flows from financing activities:
Principal payments of long-term debt	(3,643)	(313)
Payments for the extinguishment of notes payable	0	(66,250)
Proceeds from common stock issuance	160,000	0
Payments for common stock issuance costs	(4,314)	0
Proceeds from debt issuance, net of original issue discount	176,385	115,916
Payments for debt issuance costs	(5,711)	0
Treasury stock acquired from employees upon vesting or forfeiture of restricted stock	(3,987)	(332)
Proceeds from exercise of stock options	617	42
Net cash provided by financing activities	319,347	49,063
Effect of exchange rate changes on cash and cash equivalents	(56)	(53)
Net (decrease) increase in cash and cash equivalents	(95,468)	30,739
Cash and cash equivalents at beginning of period	180,686	28,036
Cash and equivalents at end of period	85,218	58,775
Supplemental non-cash investing and financing flow information:
Cash paid for interest	3,724	1,262
Cash taxes paid, net of refunds	58	10
Capitalized software recorded in accounts payable	73	245
Capital expenditures in accounts payable	20	0
Tax withholding in accrued salaries and benefits related to treasury stock acquired from employees	482	0
Common stock issued for acquisition	108,659	0
Acquisition consideration not yet settled	$ 1,001	$ 0