Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 10,283	$ 3,515
Restricted cash	1,800
Accounts receivable, net	3,178	3,966
Unbilled accounts receivable	31	155
Inventories	8,133	8,832
Prepaid expenses and other current assets	1,796	1,130
Total current assets	25,221	17,598
Equipment, furniture and leasehold improvements, net	8,147	8,100
Operating lease right - of - use assets	3,166	3,729
Intangibles and other assets	128	160
Total assets	36,662	29,587
Current liabilities:
Accounts payable	1,009	1,302
Accrued compensation	1,700	1,778
Paycheck Protection Program loan - current	735
Revolving credit facility, net	490	2,891
Common stock warrant liability	3,327	23
Other accrued expenses	1,604	1,401
Deferred revenue	393	277
Operating lease liability - current	826	775
Other current liabilities	632	342
Total current liabilities	10,716	8,789
Other liability - long term	67	24
Paycheck Protection Program loan - long term	1,228
Deferred Income - Government awards - long term	2,263
Operating lease liability - long term	2,441	3,067
Total liabilities	16,715	11,880
Commitments and contingencies (Note 8)
Shareholders' equity:
Preferred stock, $.001 par value: authorized 10,000,000 shares: Series B Convertible Preferred stock, (liquidation preference of $5,659) stated value $1,000 per share, $.001 par value: 10,000 shares designated and 5,659 issued and outstanding as of September 30, 2020 and December 31, 2019.
Common stock, $.001 par value: authorized 200,000,000 shares, issued 67,661,668 shares, outstanding 67,499,602 shares as of September 30, 2020 and issued 50,250,378 shares, outstanding 50,088,312 shares as of December 31, 2019.	68	50
Additional paid-in capital	268,720	258,767
Accumulated deficit	(248,341)	(240,610)
Treasury stock, 162,066 shares as of September 30, 2020 and December 31, 2019.	(500)	(500)
Total shareholders' equity	19,947	17,707
Total liabilities and shareholders' equity	$ 36,662	$ 29,587