CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 32,415	$ 16,466
Short term investments	40,885	61,678
Trade accounts receivable, net of allowance of $196 and $428	4,931	5,015
Inventories, net of provision for obsolescence of $398 and $439	5,598	5,212
Prepaid expenses and other current assets	1,411	1,146
Total current assets	85,240	89,517
Property and equipment, net	6,031	5,788
Intangibles	190	191
Deposits	80	73
Other assets	162	41
Total assets	91,703	95,610
Current liabilities:
Accounts payable	1,504	1,423
Accrued and other liabilities	5,460	5,552
Accrued severance and related	511	727
Total current liabilities	7,475	7,702
Note payable	140	140
Long term lease liability	75
Total liabilities	7,690	7,842
STOCKHOLDERS’ EQUITY
Common stock, $0.001 par value; 75,000,000 shares authorized; 34,033,255 issued and 33,891,255 outstanding as of March 31, 2019 and 33,847,100 issued and 33,704,525 outstanding as of December 31, 2018	34	34
Additional paid-in capital	53,147	52,221
Retained earnings	30,832	35,513
Total stockholders’ equity	84,013	87,768
Total liabilities and stockholders’ equity	$ 91,703	$ 95,610