Cash and Cash Equivalents, Restricted Time Deposits and Marketable Securities

6 Months Ended

Jun. 30, 2012

Cash and Cash Equivalents, Restricted Time Deposits and Marketable Securities [Abstract]

Cash and Cash Equivalents, Restricted Time Deposits and Marketable Securities

Cash and Cash Equivalents, Restricted Time Deposits and Marketable Securities

MRV treats highly liquid investments with an original maturity of 90 days or less as cash equivalents. Investments with maturities of less than one year are considered short-term. MRV maintains cash balances and investments in qualified financial institutions, and at various times such amounts are in excess of federal insured limits.

The Company accounts for its marketable securities under the provisions of ASC 320-10 Accounting for Certain Investments in Debt and Equity Securities. Original cost approximated market value of the Company's $3.8 million in marketable securities held as of June 30, 2011, and the related unrealized loss was $38,000. As of June 30, 2012 and December 31, 2011, MRV did not hold any marketable securities.