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Commitments and Contingencies Loss Contingencies (Details) (USD $) In Thousands, unless otherwise specified | 7 Months Ended | 1 Months Ended |
--- | --- | --- | ---
Jan. 31, 2008 officers | Jan. 31, 2012 | Jun. 30, 2010 | Jul. 31, 2009 | Feb. 28, 2009 counts
Materially Misstated Financial Statements |  |  |  |  |
Loss Contingencies |  |  |  |  |
Number of officers | 2 us-gaap_LossContingencyNumberOfDefendants / us-gaap_LossContingenciesByNatureOfContingencyAxis = clro_MateriallyMisstatedFinancialStatementsMember |  |  |  |
Officer, Flood | Criminal | Materially Misstated Financial Statements |  |  |  |  |
Loss Contingencies |  |  |  |  |
Loss contingency, number of convicted counts |  |  |  |  | 9 clro_LossContingencyNumberOfConvictedCounts / us-gaap_LitigationCaseAxis = clro_CriminalMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = clro_MateriallyMisstatedFinancialStatementsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = clro_OfficerFloodMember
Prison sentence, years |  |  | 4 years |  |
Probation, in years |  |  | 3 years |  |
Loss contingency, legal fees incurred |  | $ 373 clro_LossContingencyLegalFeesIncurred / us-gaap_LitigationCaseAxis = clro_CriminalMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = clro_MateriallyMisstatedFinancialStatementsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = clro_OfficerFloodMember |  | $ 373 clro_LossContingencyLegalFeesIncurred / us-gaap_LitigationCaseAxis = clro_CriminalMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = clro_MateriallyMisstatedFinancialStatementsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = clro_OfficerFloodMember |
Loss contingency, legal fees, paid in escrow |  |  |  | 248 clro_LosstContingencyLegalFeesPaidInEscrow / us-gaap_LitigationCaseAxis = clro_CriminalMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = clro_MateriallyMisstatedFinancialStatementsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = clro_OfficerFloodMember |
Loss contingency, damages paid, value |  |  |  | 3,630 us-gaap_LossContingencyDamagesPaidValue / us-gaap_LitigationCaseAxis = clro_CriminalMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = clro_MateriallyMisstatedFinancialStatementsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = clro_OfficerFloodMember |
Loss contingency, legal fees, refunded from escrow |  | 248 clro_LossContingencyLegalFeesRefundedFromEscrow / us-gaap_LitigationCaseAxis = clro_CriminalMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = clro_MateriallyMisstatedFinancialStatementsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = clro_OfficerFloodMember |  |  |
Officer, Strohm | Criminal | Materially Misstated Financial Statements |  |  |  |  |
Loss Contingencies |  |  |  |  |
Loss contingency, number of convicted counts |  |  |  |  | 1 clro_LossContingencyNumberOfConvictedCounts / us-gaap_LitigationCaseAxis = clro_CriminalMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = clro_MateriallyMisstatedFinancialStatementsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = clro_OfficerStrohmMember
Probation, in years |  |  | 2 years |  |
Probation sentence, in hours |  |  | 150 hours |  |
Flood [Member] | Counterclaims [Member] |  |  |  |  |
Loss Contingencies |  |  |  |  |
Gain contingency, unrecorded amount |  |  |  | $ 3,390 us-gaap_GainContingencyUnrecordedAmount / us-gaap_CounterpartyNameAxis = us-gaap_FloodMember / us-gaap_GainContingenciesByNatureAxis = clro_CounterclaimsMember |

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- Definition The amount or range of possible amounts of gain that could be realized upon the resolution of a contingency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6397426&loc=d3e17499-108355 + Details
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- Definition Amount of damages paid to the plaintiff in the legal matter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
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