Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income	$ (4,610,000)	$ 1,681,000	$ (16,100,000)
Adjustments to reconcile net loss to cash used in operating activities:
Change in fair value of common stock warrant liabilities		(322,000)
Change in fair value of contingent consideration	(31,000)	(140,000)
Issuance and offering costs		769,000
Depreciation	149,000	236,000
Amortization of intangible assets	13,000	20,000
Lease amortization	166,000	289,000
Gain on disposal of property and equipment	(328,000)
Stock-based compensation	260,000	325,000
Unrealized gain on corporate securities		(7,463,000)
Impairment of property and equipment		210,000
Write-down of inventory	368,000	160,000
Changes in operating assets and liabilities:
Accounts receivable	(1,398,000)	(293,000)
Inventories	669,000	184,000
Prepaid expenses and other current assets	208,000	(90,000)
Other noncurrent assets	22,000
Accounts payable and accrued expenses	(198,000)	(591,000)
Amounts due to related parties	5,000	(54,000)
Unearned revenue		55,000
Other current liabilities		3,000
Operating lease payments	(180,000)	(272,000)
Net cash used in operating activities	(4,885,000)	(4,707,000)	(25,900,000)
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sale of property and equipment	787,000
Purchases of property and equipment	(40,000)	(485,000)
Net cash provided by (used in) investing activities	747,000	(485,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments on debt		(2,009,000)
Proceeds from ESPP purchases	4,000	21,000
Capital contributions received from non-controlling interest		750,000
Net cash provided by financing activities	4,000	21,997,000
Net (decrease) increase in cash and cash equivalents	(4,134,000)	16,805,000
Cash and cash equivalents - beginning of period	28,685,000	16,043,000	16,043,000
Cash and cash equivalents - end of period	24,551,000	32,848,000	$ 28,685,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for interest	1,000	19,000
NONCASH INVESTING AND FINANCING ACTIVITIES:
Purchases of fixed assets included in accounts payable and accrued expenses	25,000
January 2021 PIPE Purchase Agreement [Member]
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock and warrants from offering		25,147,000
Payments of offering costs		(1,912,000)
NONCASH INVESTING AND FINANCING ACTIVITIES:
Common stock warrants issued to placement agent and included in offering costs related to purchase agreement		$ 942,000
Accounting Standards Update 2020-06 [Member]
NONCASH INVESTING AND FINANCING ACTIVITIES:
Common stock warrant liabilities reclassified to equity	$ 3,392,000