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Component: (Network and Table)
Network
100590 - Disclosure - Share-Based Payment - RSU Activity (Details)
(http://www.alliancehealthcareservices-us.com/20161231/taxonomy/role/DisclosureShareBasedPaymentRSUActivityDetails)
TableSchedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000817135 (http://www.sec.gov/CIK)
Award TypeRestricted stock units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
Rollforward of RSU activity - Shares
 
Beginning balance, unvested (shares)
74,413  
Granted (shares)
175,441  
Vested (shares)
(74,413) 
Forfeited (shares)
(7,588) 
Ending balance, unvested (shares)
167,853  
 
Rollforward of RSU Activity - Weighted Average Grant Date Fair Value
 
Beginning balance, unvested, weighted-average grant-date fair value (dollars per share)
9.18  
Granted, weighted-average grant-date fair value (dollars per share)
8.30  
Vested, weighted-average grant-date fair value (dollars per share)
9.18  
Forfeited, weighted-average grant-date fair value (dollars per share)
6.93  
Ending balance, unvested, weighted-average grant-date fair value (dollars per share)
8.37  
Aggregate Unrecognized Compensation
 
Aggregate unrecognized compensation
1,182,000  
Weighted average period over which expected to be recognized (in years)
P1Y3M18D