Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Short-term debt:
Current portion of long-term debt	$ 114	$ 123
Total short-term debt	114	123
Long-term debt:
Finance lease obligations	106	155
Other promissory notes	722	105
Total	828	260
Less: current portion of long-term debt	(114)	(123)
Total long-term debt	$ 714	$ 137