CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash	$ 3,033	$ 3,523
Accounts receivable, net of allowance of $50 and $50, respectively	4,635	4,454
Contract assets	544	814
Prepaid expenses and other current assets	120	156
Total current assets	8,332	8,947
Property, plant and equipment, net	7,734	7,964
Intangibles, net	49	50
Right-of-use operating lease assets	4,039	4,334
Other assets	340	256
Total assets	20,494	21,551
Current liabilities:
Accounts payable and accrued liabilities	2,271	2,204
Contract liabilities	900	623
Current lease liabilities	1,196	1,181
Total current liabilities	4,367	4,008
Operating lease liability, long-term	2,875	3,180
Total liabilities	7,242	7,188
Commitments and contingencies (Note 8)
Stockholders' equity:
Common stock, $0.001 par value, 24,500,000 shares authorized, 15,906,010 and 15,906,010 shares issued, respectively	16	16
Additional paid-in capital	73,571	73,521
Treasury stock, 3,364,645 and 2,620,830 shares, respectively, at cost	(2,808)	(2,284)
Accumulated deficit	(57,527)	(56,890)
Total stockholders' equity	13,252	14,363
Total liabilities and stockholders' equity	$ 20,494	$ 21,551