Warrants (Details) (Warrant [Member], Common Stock [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014
Class of Warrant or Right [Line Items]
Warrants outstanding	1,273
Fundraising [Member] | November 2007 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	24
Weighted average exercise price	$ 12.38
Issuance of Debt [Member] | Various 2009 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	287
Weighted average exercise price	$ 16.26
Issuance of Debt [Member] | Various 2010 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	394
Weighted average exercise price	$ 13.25
Issuance of Debt [Member] | May 2011 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	48
Weighted average exercise price	$ 16.26
Issuance of Debt [Member] | August 2011 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	32
Weighted average exercise price	$ 13.25
Issuance of Debt [Member] | September 2011 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	56
Weighted average exercise price	$ 15.00
Issuance of Debt [Member] | Various 2012 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	319
Weighted average exercise price	$ 15.00
Issuance of Debt [Member] | Various 2013 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	86
Weighted average exercise price	$ 13.92
Mortgage Renewal [Member] | August 2011 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	20
Weighted average exercise price	$ 15.00
Referral Fees [Member] | September 2013 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	7
Weighted average exercise price	$ 13.25