Stockholders' Equity - Additional Information (Details) - USD ($)			12 Months Ended
	Aug. 06, 2018	Aug. 06, 2013	Dec. 31, 2018	Dec. 31, 2017	Aug. 29, 2011
Stockholders Equity Note [Abstract]
Number of shares authorized and available for repurchase (in shares)			540,000		100,000
Treasury stock, shares (in shares)			81,584
Value of repurchased common stock			$ 580,000	$ 580,000
Total warrants distributed (in shares)		12,981,025
Dividend declaration date			Aug. 06, 2013
Dividend date of record			Jul. 29, 2013
Number of warrants received for each share of common stock (in shares)			5
Number of warrants that entitle holder to purchase one share of common stock (in shares)			25
Number of common shares callable by warrants (in shares)			1
Warrant exercise price (in dollars per share)			$ 7.50
Gross proceeds from warrant exercises	$ 926,948		$ 927,000
Issuance of shares on exercise of warrants	123,593