Term Loans (Details) (USD $)	12 Months Ended	1 Months Ended		9 Months Ended	12 Months Ended		1 Months Ended			6 Months Ended
	Dec. 31, 2013	Jan. 31, 2014 payment	Mar. 31, 2013	Mar. 31, 2013 item	Dec. 31, 2014	Dec. 31, 2012	Apr. 30, 2014	May 31, 2011 payment	Mar. 31, 2011	Jun. 30, 2013
Term Loans
Proceeds from term loans	$ 13,500,000
Future principal payments under the GECC and Oxford Term Loans
2015					9,214,000
2016					4,607,000
Total principal payments					13,821,000
Less current portion	(9,451,000)				(9,214,000)
Long term obligation	13,820,000				4,607,000
GECC Term Loan
Term Loans
Proceeds from term loans			12,900,000
Annual interest rate on term loan (as a percent)					9.75%
Number of equal monthly payments of principal plus accrued interest		30		9
Exit fee to be paid					788,000
Interest expense recognized	2,500,000				2,100,000	1,700,000
Transaction and exit fees and expenses recognized in interest expense	600,000				400,000	300,000
Future principal payments under the GECC and Oxford Term Loans
Total principal payments			22,500,000	22,500,000
GECC Term Loan | Maximum
Term Loans
Amount of equipment financing allowed under covenants without any restriction					4,000,000
Oxford Term Loan
Term Loans
Proceeds from term loans									2,000,000
Annual interest rate on term loan (as a percent)					13.35%
Number of equal monthly payments of principal plus accrued interest								36
Interest expense recognized	127,000				59,000	172,000
Number of equal monthly payments of principal plus accrued interest						36
Full payment of the original loan							2,000,000
Principal amount of debt issued										600,000
Administrative, legal fees and expenses paid					108,000
Oxford Term Loan | Maximum
Term Loans
Additional amount that the Company may fully utilized in equipment financing						600,000
Oxford Term Loan | Minimum
Term Loans
Amount of debt assumption from acquisitions requiring prior written consent under covenants					$ 2,000,000