Note 3. Cash, cash equivalents, short-term investments, and restricted cash and investments

The following table summarizes the Company’s cash, cash equivalents, short-term investments, and restricted cash and investments at June 30, 2014 and December 31, 2013 (in thousands):

	June 30, 2014		December 31, 2013
Cash and cash equivalents:
Cash	$	27,946		$	50,550
Cash equivalents		97			6,551
Cash and cash equivalents	$	28,043		$	57,101
Short-term investments	$	—		$	17,916
Restricted cash and investments:
Restricted cash and investments	$	12,386		$	2,138
Restricted cash and investments, non-current		14,000			—
Total restricted cash and investments	$	26,386		$	2,138

The Company classifies cash equivalents and investments in marketable securities as restricted cash and investments on its condensed consolidated balance sheets, respectively, for compensating balance requirements related to (i) its term loan facility with Comerica Bank in the U.S. and (ii) the notes payable issued to its suppliers in China and to its subsidiary in China in exchange for accounts payable (see Note 8).

The following table summarizes the Company’s unrealized gains and losses related to its cash equivalents, restricted cash and investments in marketable securities designated as available-for-sale (in thousands):

	As of June 30, 2014								As of December 31, 2013
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Cash equivalents:
Money market funds	$	97	$	—	$	—	$	97	$	11	$	—	$	—		$	11
Time deposits		—		—		—		—		6,540		—		—			6,540
Total		97		—		—		97		6,551		—		—			6,551
Short-term investments and restricted cash and investments:
Money market funds		17,290		—		—		17,290		4,577		—		—			4,577
Corporate bonds		2,004		6		—		2,010		6,708		3		(5	)		6,706
Foreign bonds and notes		—		—		—		—		4,827		5		—			4,832
Variable rate demand notes		1,700		—		—		1,700		1,801		—		—			1,801
Total		20,994		6		—		21,000		17,913		8		(5	)		17,916
Total marketable securities	$	21,091	$	6	$	—	$	21,097	$	24,464	$	8	$	(5	)	$	24,467

The following is based on the maturity dates of the underlying marketable securities (in thousands):

	June 30, 2014		December 31, 2013
Less than 1 year	$	17,387	$	20,658
Due in 1 to 2 years		2,010		2,008
Due in 2 to 5 years		—		—
Due after 5 years		1,700		1,801
Total	$	21,097	$	24,467

Realized gains and losses on the sale of marketable securities during the three and six months ended June 30, 2014 and 2013 were immaterial. The Company did not recognize any impairment losses on its marketable securities during the three and six months ended June 30, 2014 or 2013. As of June 30, 2014, the Company did not have any investments in marketable securities that were in an unrealized loss position for a period in excess of 12 months.