Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 15,603	$ 9,598
Accounts receivable, net	971	620
Inventories	10,857	10,653
Other current assets	6,881	7,084
Total Current Assets	34,312	27,955
Restricted cash	627	969
Inventories, net of current portion	6,334	7,594
Property and equipment, net	6,963	4,706
Intangible Assets	25,802	28,596
Net deferred tax assets	40	0
Other long term assets	1,896	2,489
Total Assets	75,974	74,779
Current Liabilities:
Accounts payable	2,347	3,579
Accrued expenses	6,840	8,553
Deferred revenue - current portion	868	818
Contingent consideration - current portion	0	73
Total Current Liabilities	10,055	13,023
Long Term Liabilities:
Deferred revenue - less current portion	0	27
Contingent consideration - less current portion	2,278	1,011
Notes payable, net of issuance costs	2,815	0
Warrant liabilities	187	2,388
Net deferred tax liabilities	0	1,392
Other long term liabilities	1,082	1,403
Total Liabilities	16,417	19,244
Commitments and Contingencies (Note 13)
Stockholders' Equity:
Common stock $0.001 par value, 750,000,000 shares authorized at June 30, 2020 and December 31, 2019; 56,902,140 and 20,691,301 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively	57	21
Preferred stock, $0.01 par value, 25,000,000 shares authorized, including 7,937,057 and 0 shares of Series A Convertible Preferred Stock at June 30, 2020 and December 31, 2019, and 0 shares issued and outstanding at June 30, 2020 and December 31, 2019	0	0
Additional paid-in capital	754,818	720,484
Accumulated deficit	(694,038)	(663,600)
Accumulated other comprehensive loss	(1,280)	(1,370)
Total Stockholders' Equity	59,557	55,535
Total Liabilities and Stockholders' Equity	75,974	74,779
Intellectual Property [Member]
Current Assets:
Intangible Assets	25,802	28,596
In Process Research and Development [Member]
Current Assets:
Intangible Assets	$ 0	$ 2,470