Debt - Additional Information (Details) - USD ($)			12 Months Ended
	Dec. 23, 2014	Nov. 13, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Oct. 23, 2014
Debt Instrument [Line Items]
Debt outstanding			$ 0	$ 0
Accrued interest paid			$ 332,244	$ 4,702,333	$ 2,926,355
Common stock, shares issued			33,536,940	33,468,342
Amortization of deferred financing costs and loan discount			$ 144,823	$ 916,322	$ 238,925
$1,500,000 10% Note
Debt Instrument [Line Items]
Debt instrument, face amount			$ 1,500,000
Debt instrument stated percentage			10.00%
Debt instrument, maturity date			Dec. 23, 2020
Payments of revolving notes payable			$ 1,500,000
Debt instrument, description			In connection with the issuance of these notes, in February 2010, for every $16.39 that was borrowed with the notes, one share of common stock was issued to the lender.
Debt note convertible conversion price			$ 16.39
Common stock, shares issued			91,528
Fair value of common stock issued			$ 6.56
$1,500,000 10% Note | IPO
Debt Instrument [Line Items]
Accrued interest paid			$ 854,925
$27,000,000 Revolving Note Payable
Debt Instrument [Line Items]
Debt outstanding			24,000,000
Debt instrument, face amount			$ 27,000,000
Debt instrument, maturity date			Oct. 31, 2015
Line of credit facility, unused capacity, commitment fee percentage			1.00%
Line of credit facility, collateral fees amount			$ 3,000,000
Line of credit facility, interest rate description			Base Rate was defined as the rate of interest publicly quoted by The Wall Street Journal as the “base rate on corporate loans posted by at least 75% of the nation’s 30 largest banks.” If the Company elected to utilize the LIBOR Rate, it could elect to use a 1, 2, or 3 month LIBOR Rate with the interest payable upon the last day of the interest period applicable to the Company’s LIBOR rate election. Interest for the Base Rate loan was payable monthly with the balance of any outstanding advances due at maturity.
Notes payable				$ 24,000,000
$27,000,000 Revolving Note Payable | LIBOR Rate
Debt Instrument [Line Items]
Line of credit facility, interest rate			8.00%
$27,000,000 Revolving Note Payable | Base Rate
Debt Instrument [Line Items]
Line of credit facility, interest rate			6.00%
$27,000,000 Revolving Note Payable | IPO
Debt Instrument [Line Items]
Accrued interest paid			$ 198,084
$40,000,000 Credit Facilities
Debt Instrument [Line Items]
Debt instrument, face amount		$ 40,000,000	40,000,000
$40,000,000 Credit Facilities | Capex Commitments
Debt Instrument [Line Items]
Debt instrument, face amount	$ 30,000,000	12,000,000
$40,000,000 Credit Facilities | Term Facility
Debt Instrument [Line Items]
Debt instrument, face amount		$ 18,000,000
Credit facility term		5 years
Extinguishment amount of debt	18,000,000
$40,000,000 Credit Facilities | Revolving Facility
Debt Instrument [Line Items]
Debt instrument, face amount		$ 10,000,000
Credit facility term		3 years
Increase in credit facility	$ 10,000,000
$40,000,000 Credit Facilities | LIBOR Rate | Revolving Facility
Debt Instrument [Line Items]
Line of credit facility, interest rate		4.75%
$40,000,000 Credit Facilities | LIBOR Rate | Revolving Facility | Minimum
Debt Instrument [Line Items]
Line of credit facility, interest rate		3.75%
$40,000,000 Credit Facilities | LIBOR Rate | Revolving Facility | Maximum
Debt Instrument [Line Items]
Line of credit facility, interest rate		4.75%
$40,000,000 Credit Facilities | Base Rate | Revolving Facility
Debt Instrument [Line Items]
Line of credit facility, interest rate		3.75%
$40,000,000 Credit Facilities | Base Rate | Revolving Facility | Minimum
Debt Instrument [Line Items]
Line of credit facility, interest rate		2.75%
$40,000,000 Credit Facilities | Base Rate | Revolving Facility | Maximum
Debt Instrument [Line Items]
Line of credit facility, interest rate		3.75%
$62,500,000 Revolving Note Payable
Debt Instrument [Line Items]
Debt instrument, face amount			62,500,000
Payments of revolving notes payable			62,500,000
Accrued interest paid			$ 198,469
Line of credit facility, interest rate description			Base rate was defined as the greater of the Prime Rate on the date of the borrowing and the Federal Funds Effective Rate plus 0.5%. Interest on Base Rate Loans were payable monthly, LIBOR Rate loans were payable at the end of the selected interest rate.
Line of credit, maturity date			May 01, 2016
Amortization of deferred financing costs and loan discount			$ 311,458
$62,500,000 Revolving Note Payable | LIBOR Rate
Debt Instrument [Line Items]
Line of credit facility, interest rate			3.25%
$62,500,000 Revolving Note Payable | Base Rate
Debt Instrument [Line Items]
Line of credit facility, interest rate			2.25%
$62,500,000 Revolving Note Payable | Federal Funds Effective Rate
Debt Instrument [Line Items]
Line of credit facility, interest rate			0.50%
$15,000,000 Revolving Note Payable
Debt Instrument [Line Items]
Notes payable			$ 15,000,000
$2,000,000 Convertible Stockholder Note
Debt Instrument [Line Items]
Debt instrument, face amount						$ 2,000,000
Convertible notes issuance price as percentage of face value						98.00%
$2,000,000 Convertible Stockholder Note | Redeemable Preferred Stock Series C
Debt Instrument [Line Items]
Debt note convertible conversion price						$ 5.25