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Summary of Significant Accounting Policies - Property and Equipment (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Dec. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016
Property and equipment |  |  |  |  |
Depreciation expense | $ 4,500 |  | $ 4,200 | $ 8,900 | $ 8,600
Peripheral equipment write down | 400 |  | 800 | 2,500 | 2,700
Capitalized software development costs |  |  |  | 13,378 | 13,446
Net loss | 13,189 |  | 10,899 | $ 5,030 | (2,738)
Capitalized Curriculum Development Costs |  |  |  |  |
Estimated useful life of the software |  |  |  | 5 years |
Capitalized curriculum development additions |  |  |  | $ 4,474 | 9,141
Amortization expense | 4,900 |  | 5,000 | 10,100 | 9,600
Out of period adjustment |  |  |  |  |
Property and equipment |  |  |  |  |
Capitalized software development costs |  | $ 2,300 |  |  |
Net loss |  | 1,400 |  |  |
Capitalized Curriculum Development Costs |  |  |  |  |
Capitalized curriculum development additions |  | $ 600 |  |  |
Student and state testing computers |  |  |  |  |
Property and equipment |  |  |  |  |
Accelerated Depreciation | 500 |  | 500 | $ 900 | 1,000
Student and state testing computers | Minimum |  |  |  |  |
Property and equipment |  |  |  |  |
Useful Life |  |  |  | 3 years |
Student and state testing computers | Maximum |  |  |  |  |
Property and equipment |  |  |  |  |
Useful Life |  |  |  | 5 years |
Computer hardware |  |  |  |  |
Property and equipment |  |  |  |  |
Useful Life |  |  |  | 3 years |
Computer software | Minimum |  |  |  |  |
Property and equipment |  |  |  |  |
Useful Life |  |  |  | 3 years |
Computer software | Maximum |  |  |  |  |
Property and equipment |  |  |  |  |
Useful Life |  |  |  | 5 years |
Web site development costs |  |  |  |  |
Property and equipment |  |  |  |  |
Useful Life |  |  |  | 3 years |
Office equipment |  |  |  |  |
Property and equipment |  |  |  |  |
Useful Life |  |  |  | 5 years |
Furniture and fixtures |  |  |  |  |
Property and equipment |  |  |  |  |
Useful Life |  |  |  | 7 years |
Leasehold improvements | Minimum |  |  |  |  |
Property and equipment |  |  |  |  |
Useful Life |  |  |  | 3 years |
Leasehold improvements | Maximum |  |  |  |  |
Property and equipment |  |  |  |  |
Useful Life |  |  |  | 12 years |
Capitalized software |  |  |  |  |
Property and equipment |  |  |  |  |
Useful Life |  |  |  | 3 years |
Amortization expense | $ 8,400 |  | $ 8,800 | $ 18,700 | $ 16,800

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