Consolidated Balance Sheets - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 21,352,000	$ 3,557,000
Accounts receivable, net of allowance for doubtful accounts of $2 and $4 at December 31, 2016 and 2015, respectively	74,000	107,000
Inventory	135,000	759,000
Prepaid expenses and other current assets	356,000	246,000
Total current assets	21,917,000	4,669,000
Property and equipment, net	111,000	150,000
Other assets	54,000	43,000
Total assets	22,082,000	4,862,000
Current liabilities:
Accounts payable	525,000	542,000
Accrued liabilities	544,000	692,000
Deferred rent		30,000
Deferred revenue	71,000	39,000
Grant liability	304,000
Convertible preferred stock warrant liability		275,000
Maturity date preferred stock warrant liability		10,000
Convertible shareholder notes derivative liability		1,044,000
Convertible shareholder notes, net of debt discount of $1,528 at December 31, 2015		5,672,000
Total current liabilities	1,444,000	8,304,000
Deferred rent	56,000
Total liabilities	1,500,000	8,304,000
Stockholders’ equity (deficit):
Convertible preferred stock, $0.001 par value, 0 and 43,502,124 shares authorized at December 31, 2016 and 2015, respectively; 0 and 110,500,514 shares issued and outstanding at December 31, 2016 and 2015, respectively
Common stock, $0.001 par value, 750,000,000 and 60,000,000 shares authorized at December 31, 2016 and 2015, respectively; 457,575,631 shares and 18,947,536 shares issued and outstanding at December 31, 2016 and 2015, respectively	458,000	19,000
Additional paid-in capital	80,266,000	341,000
Accumulated deficit	(60,142,000)	(49,832,000)
Total stockholders’ equity (deficit)	20,582,000	(3,442,000)
Total liabilities and stockholders’ equity (deficit)	22,082,000	4,862,000
Convertible Preferred Stock [Member]
Stockholders’ equity (deficit):
Convertible preferred stock, $0.001 par value, 0 and 43,502,124 shares authorized at December 31, 2016 and 2015, respectively; 0 and 110,500,514 shares issued and outstanding at December 31, 2016 and 2015, respectively		$ 46,030,000