Convertible Preferred Stock (Tables)

12 Months Ended

Dec. 31, 2016

Convertible Preferred Stock [Abstract]

Convertible Preferred Stock

The Company sold Convertible Preferred Stock as follows:

Issue Date	Series		Number of Shares		Price per Share		Proceeds (in thousands)		Common Stock Conversion Price		Common shares on conversion		Offer Costs (in thousands)
2009		A		390,486	$	1.00	$	390	$	1.00		390,486	$	25
2010		A		474,014	$	1.00	$	474	$	1.00		474,014	$	43
2011		B		2,333,000	$	1.25	$	2,916	$	1.25		2,333,000	$	27
2011(1)		B		82,116	$	1.25	$	103	$	1.25		82,116		—
2012		B-1		359,935	$	1.75	$	630	$	1.75		359,935	$	153
2013		C		4,631,505	$	3.85	$	17,831	$	3.85		4,631,505	$	2,747
2013(2)		C		65,809	$	3.85	$	253	$	3.85		65,809		—
2014		C-1		3,558,890	$	4.65	$	16,549	$	4.65		3,558,890	$	2,022
2015		C-2		12,043,006	$	4.65	$	56,000	$	4.65		12,043,006	$	3,783

(1) Conversion of $100,000 Note plus accrued interest of $2,645.

(2) Conversion of $250,000 promissory note plus accrued interest of $3,365.