Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2018

Balance Sheet Components [Abstract]

Accounts Payable And Accrued Liabilities

	December 31, 2018	December 31, 2017
Accounts payable and accrued liabilities:
Accounts payable	$                   1,276	$                    1,530
Accrued compensation and related expenses	1,863	1,749
Accrued liabilities	1,344	3,399
	$4,483	$6,678