DISPOSED AND DISCONTINUED OPERATIONS - Assets and Liabilities of Discontinued Operations (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
DISPOSED AND DISCONTINUED OPERATIONS
Inventories		$ 30
Other current assets		30
Deferred income tax assets	$ 269	269
Deposits and other assets	269	269
Accounts payable and other accrued expenses	200
Accrued warranty	969	914
Other accrued expenses	1,169	914
Accrued warranty	325	698
Other liabilities	200	189
Other long-term liabilities	$ 525	$ 887