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Summary of Significant Accounting Policies - Revision of Statement of Operations and Comprehensive Income (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
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Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015
Statement of Operations and Comprehensive Income: |  |  |  |  |  |  |  |  |  |  |
Income tax expense |  |  |  |  |  |  |  |  | $ (1,302) | $ (2,578) | $ (3,528)
Net income | $ 84 | $ 61 | $ 283 | $ 1,180 | $ 2,437 | $ 1,003 | $ 1,600 | $ 1,066 | $ 1,608 | $ 6,106 | $ 7,125
Net income per share: |  |  |  |  |  |  |  |  |  |  |
Net income per share, basic (dollars per share) | $ 0.01 | $ 0.00 | $ 0.02 | $ 0.09 | $ 0.18 | $ 0.07 | $ 0.12 | $ 0.08 | $ 0.12 | $ 0.44 | $ 0.51
Net income per share, diluted (dollars per share) | $ 0.01 | $ 0.00 | $ 0.02 | $ 0.08 | $ 0.17 | $ 0.07 | $ 0.11 | $ 0.08 | $ 0.11 | $ 0.42 | $ 0.50
Foreign currency translation adjustment |  |  |  |  |  |  |  |  | $ (87) | $ 244 | $ (135)
Other comprehensive income (loss), net of tax |  |  |  |  |  |  |  |  | (87) | 244 | (135)
Comprehensive income |  |  |  |  |  |  |  |  | $ 1,521 | 6,350 | 6,990
As Reported |  |  |  |  |  |  |  |  |  |  |
Statement of Operations and Comprehensive Income: |  |  |  |  |  |  |  |  |  |  |
Income tax expense |  |  |  |  |  |  |  |  |  | (2,665) | (3,666)
Net income |  |  |  |  |  |  |  |  |  | $ 6,019 | $ 6,987
Net income per share: |  |  |  |  |  |  |  |  |  |  |
Net income per share, basic (dollars per share) |  |  |  |  |  |  |  |  |  | $ 0.44 | $ 0.50
Net income per share, diluted (dollars per share) |  |  |  |  |  |  |  |  |  | $ 0.41 | $ 0.49
Foreign currency translation adjustment |  |  |  |  |  |  |  |  |  | $ 294 |
Other comprehensive income (loss), net of tax |  |  |  |  |  |  |  |  |  | 294 |
Comprehensive income |  |  |  |  |  |  |  |  |  | 6,313 | $ 6,852
Adjustments |  |  |  |  |  |  |  |  |  |  |
Statement of Operations and Comprehensive Income: |  |  |  |  |  |  |  |  |  |  |
Income tax expense |  |  |  |  |  |  |  |  |  | 87 | 138
Net income |  |  |  |  |  |  |  |  |  | 87 | 138
Net income per share: |  |  |  |  |  |  |  |  |  |  |
Foreign currency translation adjustment |  |  |  |  |  |  |  |  |  | (50) |
Other comprehensive income (loss), net of tax |  |  |  |  |  |  |  |  |  | (50) |
Comprehensive income |  |  |  |  |  |  |  |  |  | $ 37 | $ 138

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