Summary of Significant Accounting Policies (Schedule of Short-Term Investments) (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	$ 500,000	$ 5,198,878
Gross unrealized gains	$ 483	810,116
Gross unrealized losses		6,572
Estimated fair value	$ 500,483	6,002,422
Certificates of deposit [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	500,000	1,099,775
Gross unrealized gains	$ 483	$ 1,168
Gross unrealized losses
Estimated fair value	$ 500,483	$ 1,100,943
Municipal bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost		$ 536,046
Gross unrealized gains
Gross unrealized losses		$ 6,572
Estimated fair value		529,474
Corporate fixed income bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost		3,563,057
Gross unrealized gains		$ 808,948
Gross unrealized losses
Estimated fair value		$ 4,372,005