Financing Instruments - Note Purchase Agreement - Enhanced Note (Details)	Apr. 30, 2016 USD ($)	Apr. 21, 2016 USD ($)	Dec. 10, 2013 USD ($) covenant	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Line of Credit Facility [Line Items]
Repayments of debt	$ 2,000,000
Enhanced Texas Fund [Member] | Secured Debt [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 1,500,000.0
Enhanced Jobs for Texas [Member] | Secured Debt [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 5,700,000.0
Note Purchase Agreement [Member]
Line of Credit Facility [Line Items]
Debt instrument term (in years)			3 years
Note Purchase Agreement [Member] | Secured Debt [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 7,200,000.0
Interest rate during the period (percent)			12.50%
Period committed to ensure funding before maturity date			90 days
Number of debt covenants | covenant			4
Capital expenditure limit (maximum)			$ 625,000
EBITDA evaluation period			3 months
Fixed charge coverage ratio evaluation period			12 months
Value of liquidity (minimum)			$ 500,000
Unamortized discount			$ 543,000
Repayments of debt		$ 1,900,000
Notes payable, noncurrent				$ 5,700,000	$ 7,500,000
Effective interest rate (percent)				23.70%	25.60%