Discontinued Operations - Schedule of Assets and Liabilities Discontinued Operations (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Sep. 01, 2016
Current assets:
Total current assets of discontinued operations	$ 131	$ 364
Current liabilities:
Accrued expenses		3,830
Total current liabilities of discontinued operations	312	732
International operations | Discontinued operations, disposed of by sale
Current assets:
Cash	127	159	$ 4,250
Inventories, net		48
Prepaid expenses and other current assets	4	157
Total current assets of discontinued operations	131	364
Non-current assets:
Other assets	56	61
Total assets of discontinued operations	187	425
Current liabilities:
Accounts payable	0	43
Accrued expenses	312	689
Total current liabilities of discontinued operations	312	732
Non-current liabilities:
Total liabilities of discontinued operations	$ 312	$ 732