CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 11,409	$ 9,383
Accounts receivable, net of allowances of $178 and $299 as of December 31, 2020 and 2019, respectively	18,927	18,363
Inventories	20,296	16,145
Prepaid expenses and other current assets	2,813	2,292
Total current assets	53,445	46,183
Property and equipment, net	2,827	2,042
Operating lease right-of-use assets	3,405	4,629
Intangible assets, net	7,563	10,104
Goodwill	10,266	10,238
Other assets	1,171	1,122
Total assets	78,677	74,318
Current liabilities:
Accounts payable	10,964	8,799
Current portion - contractual payment obligation	1,040	1,311
Current portion - financial liabilities, net of debt issuance costs of $59 and $41 as of December 31, 2020 and 2019, respectively	20,084	14,189
Operating lease liabilities	1,279	1,814
Deferred revenue	1,981	2,193
Accrued compensation and related benefits	2,985	1,671
Other accrued expenses and liabilities	3,240	4,498
Total current liabilities	41,573	34,475
Long-term contractual payment obligation		360
Long-term operating lease liabilities	2,272	3,013
Long-term deferred revenue	385	640
Other long-term liabilities	258	364
Total liabilities	44,488	38,852
Commitments and contingencies (see Note 18)
Stockholders´ equity:
Common stock, $0.001 par value: 50,000 shares authorized; 19,450 and 18,209 shares issued and 18,055 and 16,986 shares outstanding as of December 31, 2020 and 2019, respectively	19	18
Additional paid-in capital	452,129	447,965
Treasury stock 1,395 and 1,223 shares as of December 31, 2020 and 2019, respectively	(9,933)	(9,043)
Accumulated deficit	(410,609)	(405,504)
Accumulated other comprehensive income	2,578	2,025
Total stockholders' equity	34,189	35,466
Total liabilities and stockholders´ equity	78,677	74,318
Series B Convertible Preferred Stock
Stockholders´ equity:
Series B preferred stock, $0.001 par value: 5,000 shares authorized; 5,000 shares issued and outstanding as of December 31, 2020 and 2019, respectively	$ 5	$ 5