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Income Taxes (Details 2)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Effective Income Tax Rate Reconciliation [Line Items]
Expected federal statutory rate	(34.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	(34.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State tax rate, net of federal benefit	(6.00%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	(6.00%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Change in effective state tax rate	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	(0.30%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate
Permanent items - stock-based compensation	2.50%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost
Permanent items - non-deductible merger expenses	0.40%rtgn_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMergerExpensesPercent	0.00%rtgn_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMergerExpensesPercent
Permanent items - other	0.10%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther	1.30%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther
Adjustment of NOL due to deconsolidation	6.20%rtgn_ChangeInAvailableNolDueToDeconsolidation	0.00%rtgn_ChangeInAvailableNolDueToDeconsolidation
Change in valuation allowance	30.80%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	39.00%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Income tax provision (benefit)	0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations	0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations

X

- Definition

It represents percentage of change in available NOL due to deconsolidation during the period.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to merger expenses.

+ References

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to equity-based compensation costs.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other tax credits.

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