Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Schedule of Financial Instruments Recognized at Fair Value on Recurring Basis

The following table presents information about financial instruments recognized at fair value on a recurring basis as of December 31, 2016 and 2015, and indicates the fair value hierarchy:

	December 31, 2016
	Level 1	Level 2	Level 3	Total
Assets
Restricted cash	$           3,964	$                -	$                -	$          3,964
Total assets recorded at fair value	$           3,964	$                -	$                -	$          3,964
	December 31, 2015
	Level 1	Level 2	Level 3	Total
Assets
Short-term available-for-sale investments	$              226	$                -	$                -	$             226
Restricted cash	4,026	-	-	4,026
Total assets recorded at fair value	$           4,252	$                -	$                -	$          4,252