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REVENUE - Adoption of ASC 606 Affect Prior Year (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Jul. 01, 2018 | Jun. 30, 2018 | Sep. 30, 2017
--- | --- | --- | --- | ---
ASSETS |  |  |  |
Prepaid expenses and other current assets | $ 1,463 | $ 1,180 | $ 929 | $ 1,056
Other assets | 1,900 | 1,974 | 720 | 289
LIABILITIES |  |  |  |
Deferred revenue | 1,428 | 1,638 | 511 | 439
SHAREHOLDERS' EQUITY |  |  |  |
Accumulated deficit | (238,692) | (232,372) | (232,748) | $ (223,635)
As Reported |  |  |  |
ASSETS |  |  |  |
Prepaid expenses and other current assets | 1,210 |  | 929 |
Other assets | 636 |  | 720 |
LIABILITIES |  |  |  |
Deferred revenue | 312 |  | 511 |
SHAREHOLDERS' EQUITY |  |  |  |
Accumulated deficit | (239,092) |  | $ (232,748) |
Adjustment | ASC 606 |  |  |  |
ASSETS |  |  |  |
Prepaid expenses and other current assets | (253) | 251 |  |
Other assets | (1,264) | 1,254 |  |
LIABILITIES |  |  |  |
Deferred revenue | (1,116) | 1,127 |  |
SHAREHOLDERS' EQUITY |  |  |  |
Accumulated deficit | $ (400) | $ 376 |  |

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