Credit Facility (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Nov. 21, 2014	Sep. 30, 2015	Sep. 30, 2015	Aug. 31, 2015	Dec. 31, 2014	Nov. 30, 2014
Line of Credit
Line of Credit Facility
Deferred finance costs				$ 62		$ 711
Amortization and interest expense capitalized		$ 190	$ 436
Amortization of debt issuance costs
Remainder of 2015			49
2016			197
2017			197
2018			175
Amortization of debt issuance costs			$ 618
Line of Credit | Minimum
Line of Credit Facility
Interest rate percentage			2.67%
Line of Credit | Maximum
Line of Credit Facility
Interest rate percentage			3.28%
Line of Credit | LIBOR
Line of Credit Facility
Floating interest rate, basis			LIBOR
Line of Credit | LIBOR | Minimum
Line of Credit Facility
Spread on floating interest rate (as a percent)			2.50%
Line of Credit | LIBOR | Maximum
Line of Credit Facility
Spread on floating interest rate (as a percent)			3.50%
Line of Credit | Prime Rate
Line of Credit Facility
Floating interest rate, basis			Prime Rate
Line of Credit | Prime Rate | Minimum
Line of Credit Facility
Spread on floating interest rate (as a percent)			1.50%
Line of Credit | Prime Rate | Maximum
Line of Credit Facility
Spread on floating interest rate (as a percent)			2.50%
Revolving Line of Credit
Line of Credit Facility
Maximum borrowing capacity	$ 46,500
Maximum borrowing capacity with an option to increase the available amount upon the satisfaction of certain conditions	86,500
Outstanding balance		15,000	$ 15,000		$ 0
Principal payments of Debt
Debt, Total		15,000	$ 15,000		0
Revolving Line of Credit | Minimum
Line of Credit Facility
Fee on unused portion of Revolving Line of Credit (as a percent)			0.375%
Revolving Line of Credit | Maximum
Line of Credit Facility
Fee on unused portion of Revolving Line of Credit (as a percent)			0.50%
Term Loan
Line of Credit Facility
Maximum borrowing capacity	$ 3,500
Outstanding balance		3,063	$ 3,063		3,500
Term of the debt	4 years
Principal payments of Debt
Remainder of 2015		438	438
2016		875	875
2017		875	875
2018		875	875
Debt, Total		$ 3,063	$ 3,063		$ 3,500