CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 13,675	$ 9,659
Accounts receivable, net of allowance for doubtful accounts of $219 and $215, respectively	12,999	15,710
Due from – related parties	0	1
Inventories, net	28,873	32,596
Lease receivable, current, net of allowance for doubtful accounts of $36 and $0, respectively	2,593	2,069
Contract acquisition costs, current	865	30
Other current assets	3,073	3,066
Total current assets	62,078	63,131
Property and equipment, net	16,587	17,331
Goodwill	26,673	26,687
Other intangible assets, net	1,764	1,958
Deferred tax asset, net	11,970	11,877
Lease receivable, non-current	11,141	9,615
Contract acquisition costs, non-current	1,623	3
Other non-current assets	6,191	5,185
Total assets	138,027	135,787
Current liabilities:
Accounts payable	7,038	9,489
Due to – related parties	367	1,828
Accrued liabilities	3,143	4,417
Current portion of deferred revenue	3,008	3,992
Line of credit and other short-term borrowings	6,019	6,000
Total current liabilities	19,575	25,726
Deferred revenue, net of current portion, and other	8,530	9,621
Total liabilities	28,105	35,347
Commitments and contingencies
Stockholders' equity:
Preferred stock, $.01 par value, 2,500,000 shares authorized, none issued or outstanding	0	0
Common stock, $.01 par value, 10,250,000 and 10,000,000 shares authorized, respectively, none issued or outstanding	0	0
Public common stock, $.01 par value, 10,250,000 and 10,000,000 shares authorized, 7,497,717 and 7,302,954 shares issued and outstanding, respectively	75	73
Additional paid-in capital	246,422	243,598
Accumulated other comprehensive income	201	232
Accumulated deficit	(136,776)	(143,463)
Total stockholders' equity	109,922	100,440
Total liabilities and stockholders' equity	$ 138,027	$ 135,787