Income Taxes - Significant Components of Deferred Tax Assets and Liabilities(Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets
Tax loss carryforwards	$ 41,502	$ 28,000
Research and development credits and other tax credits	2,817	2,000
Stock-based compensation	4,658	3,000
Other	1,283	1,000
Total deferred tax assets	50,260	34,000
Valuation allowance	(50,260)	(34,000)
Net deferred tax asset	$ 0	$ 0