Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 27,166	$ 32,778
Short-term investments	41,061	51,106
Other receivables	7,448	5,561
Prepaid expenses	903	1,176
Total current assets	76,578	90,621
Property, plant and equipment, net	490	519
Intangible assets, net	224	270
Long-term receivables	424	420
Deferred tax assets	1,232	1,410
Total assets	78,948	93,240
Current liabilities:
Accounts payable	4,337	2,551
Accrued expense and other current liabilities	11,553	13,326
Total current liabilities	15,890	15,877
Non-current liabilities
Long-term debt	203
Other non-current liabilities	134	107
Total non-current liabilities	337	107
Total liabilities	16,227	15,984
Commitments and contingencies (Note 17)
Stockholders' Equity:
Common stock - no par value; 1,389,786 and 1,388,395 shares authorized at December 31, 2016 and March 31, 2017, respectively; 2,719,695 and 2,721,086 shares issued and outstanding at December 31, 2016 and March 31, 2017, respectively	2,946	2,939
Treasury shares - at cost; 0 shares at December 31, 2016 and 0 shares at March 31, 2017, respectively
Additional paid in capital	279,848	279,149
Accumulated other comprehensive income (loss)	(7)	10
Accumulated deficit	(220,066)	(204,842)
Total stockholders' equity	62,721	77,256
Total liabilities and stockholders' equity	$ 78,948	$ 93,240