Subsequent Events	6 Months Ended
Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	On July 11, 2019, the Company brought suit against News Corporation, News America Marketing FSI L.L.C., and News America Marketing In-Store Services L.L.C. (collectively, “News America”) in the U.S. District Court in Minnesota, alleging violations of federal and state antitrust and tortious interference laws by News America. The complaint alleges that News America has expanded and maintained its monopoly power through various wrongful acts designed to harm the Company, its last significant competitor, in the third-party in-store advertising and promotion products and services market. The suit seeks, among other relief, an injunction sufficient to prevent further antitrust injury and an award of treble damages to be determined at trial for the harm caused to the Company.

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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