Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 18,129	$ 16,363
Short-term investments, available-for-sale	80,262	0
Accounts receivable, net	749	1,115
Inventories	8,634	10,034
Prepaid expenses	3,255	3,535
Employee retention tax credit receivable	1,311	0
Other current assets	957	2,966
Total Current Assets	113,297	34,013
Restricted cash	1,154	1,166
Long-term investments, available-for-sale	37,435	0
Inventories, net of current portion	7,074	8,813
Property and equipment, net	10,971	10,342
Intellectual property, net	9,892	22,267
Net deferred tax assets	288	307
Operating lease right-of-use assets, net	5,348	1,164
Other long-term assets	1,014	186
Total Assets	186,473	78,258
Current Liabilities:
Accounts payable	3,448	1,965
Accrued expenses	5,176	5,615
Operating lease liabilities - current portion	683	686
Deferred revenue	543	789
Notes payable - current portion, net of debt discount	0	1,228
Total Current Liabilities	9,850	10,283
Long-Term Liabilities:
Contingent consideration	2,371	3,936
Noncurrent operating lease liabilities	5,006	628
Notes payable, less current portion	0	1,587
Warrant liabilities	0	255
Total Liabilities	17,227	16,689
Commitments and Contingencies (Note 20)
Stockholders' Equity:
Common stock $0.001 par value, 750,000,000 shares authorized at December 31, 2021 and December 31, 2020; 235,218,552 and 116,231,072 shares issued and outstanding at December 31, 2021 and December 31, 2020, respectively	235	116
Preferred stock, $0.01 par value, 25,000,000 shares authorized, no shares issued and outstanding at December 31, 2021 and December 31, 2020	0	0
Additional paid-in capital	954,649	781,397
Accumulated deficit	(785,374)	(722,912)
Accumulated other comprehensive income	(264)	2,968
Total Stockholders' Equity	169,246	61,569
Total Liabilities and Stockholders' Equity	186,473	78,258
Intellectual Property [Member]
Current Assets:
Intellectual property, net	$ 9,892	$ 22,267