CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 11,063	$ 8,129
Restricted cash	7,397	7,500
Accounts receivable, net of allowance for doubtful accounts of $249 and $184, respectively	2,510	4,386
Inventories	3,502	3,027
Prepaid expenses and other current assets	464	513
Total current assets	24,936	23,555
Property and equipment, net	5,258	5,369
Operating lease right-of-use assets, net	1,072	1,314
Intangible assets, net	6,697	7,955
Goodwill	8,803	8,803
Other assets	298	347
Total assets	47,064	47,343
Current liabilities:
Note payable	7,275	7,275
Current portion of long-term debt	1,134	0
Accounts payable	3,488	1,880
Other accrued liabilities	4,558	5,134
Current portion of operating lease liabilities	361	313
Deferred revenues	1,864	2,832
Total current liabilities	18,680	17,434
Long-term liabilities:
Long-term debt, net	1,394	0
Deferred tax liability	207	0
Long-term operating lease liabilities, net	804	1,078
Other liabilities	52	178
Total liabilities	21,137	18,690
Commitments and contingencies (see Note 15)
Stockholders' equity:
Series C Convertible Preferred Stock, $.10 par value, 10,000,000 shares authorized; 0 and 2,103 shares issued and outstanding at September 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 September 30, 2020 and, December 31, 2019, respectively	34	33
Additional paid-in capital	244,423	243,180
Accumulated deficit	(218,530)	(214,561)
Total stockholders' equity	25,927	28,653
Total liabilities and stockholders' equity	$ 47,064	$ 47,343