The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property by the lessor or lessee, respectively.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 25

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e39896-112707

Commitments and Contingencies (Details) (USD $)	0 Months Ended		3 Months Ended
Commitments and Contingencies (Details) (USD $)	Feb. 18, 2014	Jan. 21, 2014	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Line of Credit
Aggregate borrowing base					$ 37,000,000
Amount borrowed		5,000,000
Borrowings repaid	5,000,000
Amount outstanding			0
Aggregate expected sublease payments			600,000
Future minimum lease payments, net of aggregate expected sublease payments
2014			1,903,000
2015			2,378,000
2016			2,419,000
2017			1,921,000
2018			1,250,000
Thereafter			739,000
Total future minimum lease payments			10,610,000
Total net rent expense			500,000		500,000
Sublease income			100,000	100,000
Rent expense net of sublease income			$ 700,000	$ 400,000