CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 18,286	$ 26,862
Short term investments	64,638	0
Accounts receivable (net of allowance for doubtful accounts of $514 and $249, respectively)	23,454	18,270
Inventory	3,558	3,793
Other current assets	2,847	1,581
Total current assets	112,783	50,506
Property and equipment, net	5,906	4,071
Total assets	118,689	54,577
Current liabilities:
Accounts payable	7,108	5,552
Accrued expenses	6,930	5,573
Deferred rent	566	420
Warrant liabilities	0	1,014
Current portion of term loan credit agreement (net of deferred costs of $0 and $67, respectively)	0	350
Other	188	181
Total current liabilities	14,792	13,090
Revolving and term loan credit agreement (net of deferred costs of $0 and $196, respectively)	0	16,888
Deferred rent	1,666	2,059
Total liabilities	16,458	32,037
COMMITMENTS AND CONTINGENCIES
Shareholders’ equity:
Common stock, no par value; shares authorized — 75,000; shares issued and outstanding — 43,578 and 35,861, respectively	471,180	383,020
Other comprehensive loss
Other comprehensive loss	(39)	0
Warrants	104	397
Accumulated deficit	369,014	360,877
Total shareholders’ equity	102,231	22,540
Total liabilities and shareholders’ equity	$ 118,689	$ 54,577