Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 5,447	$ 3,515
Accounts receivable, net	6,085	3,966
Unbilled accounts receivable	16	155
Inventories	8,470	8,832
Prepaid expenses and other current assets	1,389	1,130
Total current assets	21,407	17,598
Equipment, furniture and leasehold improvements, net	7,817	8,100
Operating lease right - of - use assets	3,358	3,729
Intangibles and other assets	130	160
Total assets	32,712	29,587
Current liabilities:
Accounts payable	1,809	1,302
Accrued compensation	1,914	1,778
Paycheck Protection Program loan - current	496
Revolving credit facility, net	420	2,891
Common stock warrant liability	1,524	23
Other accrued expenses	1,598	1,401
Deferred revenue	289	277
Operating lease liability - current	809	775
Other current liabilities	508	342
Total current liabilities	9,367	8,789
Finance lease liability - long term	16	24
Paycheck Protection Program - Long Term payable	1,467
Deferred Income - Government awards - long term	2,263
Operating lease liability - long term	2,654	3,067
Total liabilities	15,767	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 June 30, 2020 and December 31, 2019.
Common stock, $.001 par value: authorized 200,000,000 shares, issued 61,407,331 shares, outstanding 61,245,265 shares as of June 30, 2020 and issued 50,250,378 shares, outstanding 50,088,312 shares as of December 31, 2019.	61	50
Additional paid-in capital	262,194	258,767
Accumulated deficit	(244,810)	(240,610)
Treasury stock, 162,066 shares as of June 30, 2020 and December 31, 2019.	(500)	(500)
Total shareholders' equity	16,945	17,707
Total liabilities and shareholders' equity	$ 32,712	$ 29,587