Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 6,771,000	$ 8,949,000
Short-term investments	6,967,000	6,923,000
Contract assets	39,000	39,000
Prepaid expenses and other assets	455,000	500,000
Total current assets	14,232,000	16,411,000
Fixed assets, net	385,000	457,000
Patents and other intangible assets, net	1,862,000	1,759,000
Other assets	10,000	10,000
Total Assets	16,489,000	18,637,000
Current Liabilities:
Accounts payable and accrued liabilities	1,119,000	1,080,000
Current portion of lease liabilities	214,000	216,000
Accrued compensation and taxes	199,000	341,000
Total current liabilities	1,532,000	1,637,000
Long Term Liabilities:
Long term lease liabilities	41,000	91,000
Total liabilities	1,573,000	1,728,000
Commitments and contingencies
Stockholders' Equity:
Preferred stock, $0.0001 par value, zero shares issued and outstanding	0	0
Common stock, $0.0001 par value, 26,699,761 and 26,697,261 shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively	3,000	3,000
Additional paid-in capital	76,753,000	76,417,000
Accumulated deficit	(61,840,000)	(59,511,000)
Total stockholders' equity	14,916,000	16,909,000
Total Liabilities and Stockholders' Equity	$ 16,489,000	$ 18,637,000