Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net loss	$ (62,482)	$ (89,947)	$ (106,818)
Income (loss) from discontinued operations, net of income taxes	37	(22,835)	(48,731)
Loss from continuing operations, net of income taxes	(62,519)	(67,112)	(58,087)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	4,360	3,370	1,716
Provision for doubtful accounts	1,326	537	638
Provision for warranties	970	659	228
Provision for inventory	82	1,817	2,004
Fair value adjustments to derivative liability	14,460	10,470
Fair value adjustments of other liabilities held at fair value	441	96	970
Amortization of debt discount and issuance costs	3,587	4,347	359
Gain on extinguishment of debt	(6,652)
Stock-based compensation expense	10,390	8,221	12,595
Payments of contingent consideration liability in excess of acquisition-date fair value	(2,419)		(1,968)
Other non-cash adjustments	684	375	267
Changes in operating assets and liabilities:
Accounts receivable	(14,660)	(6,302)	(1,393)
Inventories	(13,775)	(9,342)	(8,752)
Prepaid expenses, other current assets and other assets	(1,501)	169	(8,243)
Accounts payable, accrueds, and other liabilities	(752)	1,431	6,414
Customer deposits	17,277	3,961	4,007
Sales return liability	4,207	1,077	2,068
Legal settlement payable			(410)
Net cash flow from operating activities - continuing operations	(44,494)	(46,226)	(47,587)
Net cash flow from operating activities - discontinued operations	1,994	(13,912)	(39,446)
Net cash used in operating activities	(42,500)	(60,138)	(87,033)
Cash flows from investing activities:
Purchase of property and equipment	(3,805)	(3,956)	(2,951)
Asset acquisitions	(1,000)
Business acquisitions, net of cash and restricted cash acquired			17,943
Net cash flow from investing activities - continuing operations	(4,805)	(3,956)	(20,894)
Net cash flow from investing activities - discontinued operations	8,134	(80)	(1,120)
Net cash provided by (used in) investing activities	3,329	(4,036)	(22,014)
Cash flows from financing activities:
Proceeds from issuance of common stock for employee stock-based plans	1,970	865	1,341
Net proceeds from issuance of common stock	39,226	263	107,734
Tax payments related to shares withheld for vested restricted stock units (RSUs)	(3,145)	(1,791)	(3,064)
Gross borrowings under the Term Loan	1,000		5,000
Repayments under the Term Loan		(25,000)
Repayment of the Revolving Loan		(6,508)	(15,788)
Net proceeds from issuance of the Convertible Note		60,000
Payments of contingent consideration up to acquisition-date fair value	(4,550)		(5,766)
Deferred financing costs	(800)	(2,958)	(1,997)
Net cash provided by financing activities	35,938	31,523	109,756
Net increase (decrease) in cash, cash equivalents and restricted cash	(3,233)	(32,651)	709
Cash, cash equivalents and restricted cash at:
Beginning of period	55,300	87,951	87,242
End of period	52,067	55,300	87,951
Reconciliation of cash, cash equivalents, and restricted cash to the consolidated balance sheets
Cash and cash equivalents	51,772	54,967	87,608
Restricted cash included in other assets	$ 295	$ 333	$ 343
Restricted Cash Noncurrent Asset Statement Of Financial Position Extensible List	us-gaap:OtherAssets	us-gaap:OtherAssets	us-gaap:OtherAssets
End of period	$ 52,067	$ 55,300	$ 87,951
Supplemental disclosure of cash flow information:
Interest paid	4,193	4,198	4,089
Supplemental disclosure of non-cash investing and financing activities:
Property and equipment in accounts payable and accrued liabilities	323	413	745
Reclassification of derivative liability to equity	41,030
Acquisition of business, deferred and contingent consideration obligations at fair value			9,063
Asset acquisition, deferred and contingent consideration obligations at fair value	5,015
Asset acquisition costs included in accounts payable and accrued liabilities	213
Paycheck Protection Program
Adjustments to reconcile net loss to net cash used in operating activities
Gain on extinguishment of debt	(6,700)
Cash flows from financing activities:
Gross borrowings		$ 6,652
Revolving Loan
Cash flows from financing activities:
Gross borrowings	$ 2,237		$ 22,296