CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 11,231	$ 8,129
Restricted cash	7,397	7,500
Accounts receivable, net of allowance for doubtful accounts of $256 and $184, respectively	1,361	4,386
Inventories	3,470	3,027
Prepaid expenses and other current assets	430	513
Total current assets	23,889	23,555
Property and equipment, net	4,999	5,369
Operating lease right-of-use assets, net	1,155	1,314
Intangible assets, net	7,050	7,955
Goodwill	8,803	8,803
Other assets	314	347
Total assets	46,210	47,343
Current liabilities:
Note payable	7,275	7,275
Current portion of long-term debt	799	0
Accounts payable	2,451	1,880
Other accrued liabilities	4,703	5,134
Current portion of operating lease liabilities	353	313
Deferred revenues	1,020	2,832
Total current liabilities	16,601	17,434
Long-term liabilities:
Long-term debt, net	1,729	0
Deferred tax liability	135	0
Long-term operating lease liabilities, net	896	1,078
Other liabilities	71	178
Total liabilities	19,432	18,690
Commitments and contingencies (see Note 15)
Stockholders' equity:
Series C Convertible Preferred Stock, $.10 par value, 10,000,000 shares authorized; - and 2,103 shares issued and outstanding at June 30, 2020 and, December 31, 2019, respectively	0	1
Common Stock, $.001 par value, 150,000,000 shares authorized; 33,754,909 and 32,932,273 shares issued and outstanding at June 30, 2020 and, December 31, 2019, respectively	34	33
Additional paid-in capital	244,020	243,180
Accumulated deficit	(217,276)	(214,561)
Total stockholders' equity	26,778	28,653
Total liabilities and stockholders' equity	$ 46,210	$ 47,343