Subsequent Event	12 Months Ended
Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Event	12. SUBSEQUENT EVENT Merger On January 24, 2019, the Company completed the Merger with STI, pursuant to which Merger Sub merged with and into STI, with STI surviving as the Company's wholly-owned subsidiary. See note 2 to the consolidated financial statements above for additional information on the Merger. Severance The Company paid approximately $1.8 million in January 2019 pursuant to certain employment agreements that triggered upon the completion of the Merger with STI.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

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