CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash	$ 26,862	$ 22,978
Accounts receivable (net of allowance for doubtful accounts of $249 and $225, respectively)	18,270	17,093
Inventory	3,793	3,488
Other current assets	1,581	1,164
Total current assets	50,506	44,723
Property and equipment, net	4,071	3,875
Total assets	54,577	48,598
Current liabilities:
Accounts payable	5,552	6,535
Accrued expenses	5,573	4,523
Short term deferred rent	420	3
Warrant liabilities	1,014	757
Current portion of term loan credit agreement (net of deferred costs of $67 and $110, respectively)	350	779
Other	181	256
Total current liabilities	13,090	12,853
Revolving and term loan credit agreement (net of deferred costs of $196 and $293, respectively)	16,888	9,318
Long term deferred rent	2,059	1,687
Other long term debt	0	32
Total liabilities	32,037	23,890
COMMITMENTS AND CONTINGENCIES (Note 15)
Shareholders’ equity:
Common stock, no par value; shares authorized — 75,000; shares issued and outstanding — 35,861 and 31,595, respectively	383,020	329,720
Warrants	397	190
Accumulated deficit	360,877	343,591
Total shareholders’ equity	22,540	24,708
Total liabilities and shareholders’ equity	54,577	48,598
Series B-2
Shareholders’ equity:
Series B-2 non-voting convertible preferred stock, no par value: shares authorized and reserved — 39; shares issued and outstanding — 0 and 12, respectively	$ 0	$ 38,389