Label	Element	Value
Cumulative Effect of Foreign Currency Adjustment Due to New Accounting Adoption	sppi_CumulativeEffectofForeignCurrencyAdjustmentDuetoNewAccountingAdoption	$ 343,000
Retained Earnings [Member]
Cumulative Effect of Foreign Currency Adjustment Due to New Accounting Adoption	sppi_CumulativeEffectofForeignCurrencyAdjustmentDuetoNewAccountingAdoption	343,000
Accounting Standards Update 2014-09 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	4,678,000
Accounting Standards Update 2014-09 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 4,678,000