Condensed Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net loss	$ (1,068)us-gaap_ProfitLoss	$ (4,217)us-gaap_ProfitLoss
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	530	624
Share-based compensation expense	212us-gaap_ShareBasedCompensation	147us-gaap_ShareBasedCompensation
Provision for doubtful accounts	37us-gaap_ProvisionForDoubtfulAccounts	(77)us-gaap_ProvisionForDoubtfulAccounts
Deferred income taxes	(39)us-gaap_DeferredIncomeTaxExpenseBenefit	365us-gaap_DeferredIncomeTaxExpenseBenefit
Gain on disposition of property and equipment	(2)us-gaap_GainLossOnDispositionOfAssets	0us-gaap_GainLossOnDispositionOfAssets
Changes in operating assets and liabilities:
Accounts and other receivables	(601)	(1,092)
Inventories	1,742us-gaap_IncreaseDecreaseInInventories	(2,471)us-gaap_IncreaseDecreaseInInventories
Other assets	(674)	1,712
Accounts payable	(1,204)	455
Accrued liabilities	85	(2,076)
Income tax payable	(10)	(21)
Deferred revenue	24	371
Other current liabilities	(94)	(214)
Net cash used in operating activities	(1,062)	(6,494)
Cash flows from investing activities:
Purchases of property and equipment	(264)	(352)
Proceeds from sale of property and equipment	9	0
Release of restricted time deposits	11mrvc_ReleaseOfRestrictedTimeDeposits	5mrvc_ReleaseOfRestrictedTimeDeposits
Net cash used in investing activities	(244)	(347)
Cash flows from financing activities:
Proceeds from exercise of stock options	116	0
Purchase of treasury shares	(3,597)	0
Borrowings on short-term debt	2,669us-gaap_ProceedsFromShortTermDebt	6,819us-gaap_ProceedsFromShortTermDebt
Payments on short-term debt	(5,481)us-gaap_RepaymentsOfShortTermDebt	(4,350)us-gaap_RepaymentsOfShortTermDebt
Net cash (used in) provided by financing activities	(6,293)	2,469
Effect of exchange rate changes on cash and cash equivalents	(608)	(5)
Net decrease in cash and cash equivalents	(8,207)	(4,377)
Cash and cash equivalents, beginning of period	22,422	27,591
Cash and cash equivalents, end of period	14,215	23,214
Supplemental disclosure of cash flow information:
Cash paid during period for interest	35us-gaap_InterestPaid	51us-gaap_InterestPaid
Cash paid during period for income taxes	$ 0us-gaap_IncomeTaxesPaid	$ 0us-gaap_IncomeTaxesPaid

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