4. CASH AND CASH EQUIVALENTS AND SHORT—TERM INVESTMENTS; BANK OVERDRAFT

The Company's cash and cash equivalents and short-term investments comprise bank accounts and term deposits. Deposits with an original maturity ranging from 91 to 365 days are classified in short-term investments. Below are breakdowns of cash and cash equivalents and short-term investments:

	December 31,

	2011	2012
Cash and cash equivalents:
Russian ruble bank accounts	$6,434	$23,519
US dollar bank accounts	4,479	31,021
Other	1,418	641

Total cash and cash equivalents	$12,331	$55,181

	December 31,

	2011				2012
	Annual interest rate		Amount		Annual interest rate		Amount
Short-term investments:
Ruble-denominated deposits		4.1%–8.7%	$	102,068		7.65%–9.25%	$	131,449
US dollar-denominated deposits		2.1%–2.2%		15,165				—

Total Short-term investments			$	117,233			$	131,449

Bank overdraft—In October 2011, the Company signed a Ruble-denominated overdraft agreement with Alfa Bank bearing annual interest at 7.2% with a credit limit of approximately $34,000. In July 2012, the Company signed a new Ruble-denominated overdraft agreement with Alfa Bank bearing annual interest at the variable Mosprime Overnight rate +2.21% with a credit limit of approximately $32,000. As of December 31, 2011 and 2012, the balance of the overdraft was $16,941 and $13,181, respectively, which was presented as a current liability separately on the Company's balance sheets.