Credit Facility (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Nov. 21, 2014	Jun. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Line of Credit
Line of Credit Facility
Deferred finance costs		$ 711	$ 711
Amortization period for deferred finance cost			4 years
Amortization and interest expense capitalized		$ 170	$ 246
Amortization of debt issuance costs
2015			89
2016			178
2017			178
2018			158
Amortization of debt issuance costs			$ 603
Line of Credit | Minimum
Line of Credit Facility
Interest rate percentage		2.73%	2.73%
Line of Credit | Maximum
Line of Credit Facility
Interest rate percentage		3.28%	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		$ 10,000	$ 10,000	$ 0
Principal payments of Debt
Debt, Total		10,000	10,000	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
Amortization period for interest and principal	4 years
Outstanding balance		3,063	3,063	3,500
Principal payments of Debt
2015		438	438
2016		875	875
2017		875	875
2018		875	875
Debt, Total		$ 3,063	$ 3,063	$ 3,500