Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 2,508	$ 1,849
Restricted cash	100	100
Trade receivables, net of allowance for doubtful accounts of $24 as of June 30, 2019 and $14 as of December 31, 2018	517	419
Contract assets	18	12
Inventories	286	270
Equipment financing receivables	99	67
Contract costs	380	371
Prepaid expenses	321	244
Income tax receivable	7	1
Total current assets	4,236	3,333
Long-term trade receivables, net of allowance for doubtful accounts of $0 as of June 30, 2019 and December 31, 2018	7	10
Long term equipment financing receivables	358	184
Property and equipment, net	149	124
Operating lease right-of-use assets	974	0
Intangible assets, net	140	167
Goodwill	272	272
Contract costs, net of current portion	379	342
Other long-term assets	103	117
Total assets	6,618	4,549
Current liabilities:
Accounts payable	80	155
Accrued expenses	1,216	1,131
Finance leases	26	28
Notes payable	7	56
Operating lease liabilities	242	0
Income taxes payable	0	0
Contract liabilities	737	641
Total current liabilities	2,308	2,011
Contract liabilities, net of current portion	442	422
Finance leases, net of current portion	101	116
Operating lease liabilities, net of current portion	732	0
Total liabilities	3,583	2,549
Stockholders equity:
Preferred stock, par value $0.001 per share - authorized 5,000,000 shares; none issued	0	0
Common stock, par value $0.001 per share - authorized 25,000,000 shares, 14,581,484 shares issued and outstanding as of June 30, 2019 and 14,394,113 shares issued and outstanding as of December 31, 2018	15	14
Additional paid-in capital	61,610	61,153
Accumulated deficit	(58,590)	(59,167)
Total stockholders' equity	3,035	2,000
Total liabilities and stockholders' equity	$ 6,618	$ 4,549