Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 157,078	$ 16,363
Accounts receivable, net	960	1,115
Inventories	12,523	10,034
Other current assets	3,446	6,501
Total Current Assets	174,007	34,013
Restricted cash	1,045	1,166
Inventories, net of current portion	6,590	8,813
Property and equipment, net	9,876	10,342
Intellectual property, net	15,943	22,267
Net deferred tax assets	288	307
Operating lease right-of-use assets, net	4,099	1,164
Other long term assets	156	186
Total Assets	212,004	78,258
Current Liabilities:
Accounts payable	2,653	1,965
Accrued expenses	4,007	5,615
Operating lease liabilities - current portion	861	686
Deferred revenue	786	789
Notes payable - current portion, net of debt discount	0	1,228
Total Current Liabilities	8,307	10,283
Long Term Liabilities:
Contingent consideration	4,671	3,936
Noncurrent operating lease liabilities	3,465	628
Notes payable, less current portion	0	1,587
Warrant liabilities	0	255
Total Liabilities	16,443	16,689
Commitments and Contingencies (Note 10)
Stockholders' Equity:
Common stock $0.001 par value, 750,000,000 shares authorized at June 30, 2021 and December 31, 2020; 234,231,132 and 116,231,072 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively	234	116
Preferred stock, $0.01 par value, 25,000,000 shares authorized, no shares issued and outstanding at June 30, 2021 and December 31, 2020	0	0
Additional paid-in capital	947,249	781,397
Accumulated deficit	(753,424)	(722,912)
Accumulated other comprehensive income	1,502	2,968
Total Stockholders' Equity	195,561	61,569
Total Liabilities and Stockholders' Equity	212,004	78,258
Intellectual Property [Member]
Current Assets:
Intellectual property, net	$ 15,943	$ 22,267