ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES - Status of Our Business, Liquidity and Going Concern - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	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
Revenue
Operating revenue									$ 0	$ 0
Costs and expenses
Depreciation	$ 6	$ 7	$ 10	$ 25	$ 26	$ 27	$ 28	$ 28	48	109
General, administrative and other operating	1,971	3,380	3,006	3,966	1,434	3,266	1,829	1,877	12,323	8,406
Full-Cost ceiling test write-down	11,288		2,028			14,331			13,316	14,331
Costs and expenses									25,687	22,846
Loss from operations	$ (13,265)	$ (3,387)	$ (5,044)	$ (3,991)	$ (1,460)	$ (17,624)	$ (1,857)	$ (1,905)	$ (25,687)	$ (22,846)