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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) | 12 Months Ended
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Dec. 31, 2014 item
Restricted stock awards |
Stock-Based Compensation |
Types of vesting schedules (in count) | 3gern_ShareBasedCompensationArrangementByShareBasedPaymentAwardTypesOfVestingSchedules / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember
Service-based restricted stock awards |
Stock-Based Compensation |
Vesting period of awards | 4 years
Performance-based restricted stock awards |
Stock-Based Compensation |
Vesting period of awards | 3 years
Market-based restricted stock awards |
Stock-Based Compensation |
Vesting period of awards | 3 years
Stock options |
Stock-Based Compensation |
Vesting period of awards | 4 years

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- Definition Represents the types of vesting schedules. + References No definition available. + Details
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Namespace Prefix: | gern_
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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