Long-Term Debt (Details) - USD ($)			2 Months Ended	12 Months Ended
	Oct. 12, 2015	Dec. 31, 2011	Feb. 28, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Placement fee, warrants issued (in shares)				16,493	15,958
Amortization of debt discount				$ 0	$ 0	$ 1,328,000
5% Convertible Senior Secured Promissory Note
Debt Instrument [Line Items]
Annual interest rate		5.00%				5.00%
Proceeds from issuance of debt		$ 5,000,000
Principal of notes convertible (in shares)		5,000,000
Accrued but unpaid interest (in dollars per share)		$ 1.00
Placement fee		$ 32,800
Placement fee, warrants issued (in shares)		42,400
Warrant exercise price (in dollars per share)		$ 1.09
Fair value of placement fee warrants		$ 15,000
Direct costs of sale of notes		47,800
5% Convertible Senior Secured Promissory Note | Chairman and CEO
Debt Instrument [Line Items]
Proceeds from issuance of debt		$ 500,000
Loan Agreement
Debt Instrument [Line Items]
Total amount of debt plus accrued interest			$ 5,272,000
Convertible secured promissory note to common stock (in shares)			5,272,000
Amortization of debt discount						$ 1,328,000
Loan Agreement | Chief Executive Officer
Debt Instrument [Line Items]
Convertible secured promissory note to common stock (in shares)			532,260
Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Direct costs of sale of notes	$ 500,000
Maximum borrowing capacity	50,000,000
Uncommitted incremental facility	$ 35,000,000
Debt term	3 years
Credit Agreement | Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
Credit Agreement | Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%