Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 4,064	$ 11,211
Marketable securities	3,026	951
Receivables, net of allowance for doubtful accounts of $424 and $631, respectively	5,468	6,782
Inventories	11,441	13,228
Prepaid expenses and other assets	1,184	2,193
Total current assets	25,183	34,365
Long-term marketable securities	1,517	3,764
Long-term inventories, net	6,284	8,953
Property and equipment, net	1,044	1,388
Operating lease – right of use assets, net	2,459
Intangible assets, net	14,009	10,249
Other assets	4,614	196
Total assets	55,110	58,915
Current liabilities:
Accounts payable	2,871	3,729
Accrued liabilities	3,205	1,996
Deferred product revenue	173	283
Total current liabilities	6,249	6,008
Senior convertible notes	2,222
Deferred rent		135
Operating lease liability	2,021
Other long-term liabilities	140	571
Total liabilities	10,632	6,714
Shareholders’ equity:
Common stock, par value $0.001, 50,000,000 shares authorized, 16,650,725 and 16,630,597 shares issued and outstanding, respectively	17	17
Additional paid-in capital	58,520	57,840
Accumulated other comprehensive loss	(176)	(181)
Accumulated deficit	(13,883)	(5,475)
Total shareholders’ equity	44,478	52,201
Total liabilities and shareholders’ equity	$ 55,110	$ 58,915