Income taxes - Change in Valuation Allowance (Details) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2015 |
Jun. 30, 2015 |
Jun. 30, 2014 |
Jun. 30, 2013 |
|
| Income taxes | ||||
| Change in valuation allowance | $ 2,488 | $ 4,497 | $ 1,908 | $ 1,183 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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