Stockholders' Equity and Redeemable Convertible Preferred Stock (Details 3) - Stock Option [Member]	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares
Number of Shares
Outstanding at beginning of year | shares	275,970
Employee Options granted | shares	23,682
Employee options forfeited | shares	(13,157)
Employee options expired | shares	(8)
Outstanding at end of year | shares	286,487
Options vested and expected to vest | shares	286,487
Options vested and exercisable | shares	284,514
Weighted Average Exercise Price
Outstanding at beginning of year	$ 94.37
Employee Options granted	9.53
Employee options forfeited	54.34
Employee options expired	4,332.00
Outstanding at end of year	89.07
Options vested and expected to vest	89.07
Options vested and exercisable	$ 89.66
Total Intrinsic Value
Outstanding at beginning of year | $
Employee Options granted | $
Employee options forfeited
Employee options expired | $
Outstanding at end of year | $
Options vested and expected to vest | $
Options vested and exercisable | $
Weighted Average Remaining Contractual Life (in years)
Outstanding at beginning of year	6 years
Weighted average remaining contractual life of share Options granted	4 years 4 months 24 days
Outstanding at end of year	5 years
Options vested and expected to vest	5 years
Options vested and exercisable	5 years