Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 165,245	$ 16,363
Accounts receivable, net	2,306	1,115
Inventories	11,181	10,034
Other current assets	3,593	6,501
Total Current Assets	182,325	34,013
Restricted cash	1,149	1,166
Inventories, net of current portion	7,656	8,813
Property and equipment, net	9,179	10,342
Intellectual property, net	18,591	22,267
Net deferred tax assets	288	307
Operating lease right-of-use assets, net	4,234	1,164
Other long term assets	193	186
Total Assets	223,615	78,258
Current Liabilities:
Accounts payable	2,327	1,965
Accrued expenses	3,830	6,301
Deferred revenue - current portion	892	789
Notes payable - current portion, net of debt discount	2,459	1,228
Total Current Liabilities	9,508	10,283
Long Term Liabilities:
Contingent consideration	4,193	3,936
Notes payable, less current portion	356	1,587
Warrant liabilities	0	255
Noncurrent operating lease liabilities	3,640	628
Total Liabilities	17,697	16,689
Commitments and Contingencies (Note 10)
Stockholders' Equity:
Common stock $0.001 par value, 750,000,000 shares authorized at March 31, 2021 and December 31, 2020; 232,716,797 and 116,231,072 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively	233	116
Preferred stock, $0.01 par value, 25,000,000 shares authorized, no shares issued and outstanding at March 31, 2021 and December 31, 2020	0	0
Additional paid-in capital	944,907	781,397
Accumulated deficit	(740,252)	(722,912)
Accumulated other comprehensive income	1,030	2,968
Total Stockholders' Equity	205,918	61,569
Total Liabilities and Stockholders' Equity	223,615	78,258
Intellectual Property [Member]
Current Assets:
Intellectual property, net	$ 18,591	$ 22,267