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Stock-Based Compensation (Details) (Equity Plan, Restricted Stock Units, USD $)
0 Months Ended 3 Months Ended 6 Months Ended
Apr. 30, 2014
Mar. 24, 2014
May 03, 2013
item
Jun. 30, 2014
Jun. 30, 2014
Equity Plan | Restricted Stock Units
         
Stock-based compensation          
Shares granted   48,512 100,000   148,512
Number of equal installments to vest units over the service period     4    
Vested (in shares) 25,000        
Units Vesting percentage on September 23,2015         50.00%
Units remaining vesting percentage on March 23,2017         50.00%
Number of shares of common stock issued for each unit when vested     1    
Compensation expense recognized       $ 272,000 $ 409,000
Unrecognized compensation expense       $ 2,920,000 $ 2,920,000
Period to recognize unrecognized compensation expense         2 years 9 months 18 days
Accrued dividend equivalent units         30