CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash	$ 8,696	$ 9,383
Accounts receivable, net of allowances of $281 and $299 as of March 31, 2020 and December 31, 2019, respectively	20,040	18,363
Inventories	15,943	16,145
Prepaid expenses and other current assets	2,533	2,292
Total current assets	47,212	46,183
Property and equipment, net	1,956	2,042
Operating lease right-of-use assets	4,102	4,629
Intangible assets, net	9,342	10,104
Goodwill	10,138	10,238
Other assets	1,051	1,122
Total assets	73,801	74,318
Current liabilities:
Accounts payable	8,473	8,799
Current portion - contractual payment obligation	664	1,311
Current portion - financial liabilities, net of discount and debt issuance costs of $107 and $41 as of March 31, 2020 and December 31, 2019, respectively	17,758	14,189
Operating lease liabilities	1,662	1,814
Deferred revenue	1,736	2,193
Accrued compensation and related benefits	1,877	1,671
Other accrued expenses and liabilities	4,015	4,498
Total current liabilities	36,185	34,475
Long-term contractual payment obligation	720	360
Long-term operating lease liabilities	2,635	3,013
Long-term deferred revenue	550	640
Other long-term liabilities	357	364
Total liabilities	40,447	38,852
Commitments and contingencies (see Note 17)
Stockholders´ equity:
Common stock, $0.001 par value: 50,000 shares authorized; 18,746 and 18,209 shares issued and 17,475 and 16,986 shares outstanding as of March 31, 2020 and December 31, 2019, respectively	19	18
Additional paid-in capital	448,604	447,965
Treasury stock, 1,271 and 1,223 shares as of March 31, 2020 and December 31, 2019, respectively	(9,268)	(9,043)
Accumulated deficit	(407,551)	(405,504)
Accumulated other comprehensive income	1,545	2,025
Total stockholders´ equity	33,354	35,466
Total liabilities and stockholders' equity	73,801	74,318
Series B convertible preferred stock
Stockholders´ equity:
Series B convertible preferred stock, $0.001 par value: 5,000 shares authorized; 5,000 shares issued and outstanding as of March 31, 2020 and December 31, 2019	$ 5	$ 5