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Marketable Securities (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Marketable securities	$ 9,533,703	$ 4,672,476
U.S. Treasury notes and bonds
Debt Securities, Available-for-sale [Line Items]
Marketable securities	5,005,631	0
U.S. Agency issued mortgage-backed securities – variable rate
Debt Securities, Available-for-sale [Line Items]
Marketable securities	0	3,539,102
U.S. Agency notes and bonds – fixed rate
Debt Securities, Available-for-sale [Line Items]
Marketable securities	0	198,293
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Marketable securities	2,506,006	0
SBA loan pools – variable rate
Debt Securities, Available-for-sale [Line Items]
Marketable securities	0	935,081
Short-term cash investments
Debt Securities, Available-for-sale [Line Items]
Marketable securities	2,022,066	0
Level 1
Debt Securities, Available-for-sale [Line Items]
Marketable securities	5,005,631	0
Level 1 | U.S. Treasury notes and bonds
Debt Securities, Available-for-sale [Line Items]
Marketable securities	5,005,631	0
Level 1 | U.S. Agency issued mortgage-backed securities – variable rate
Debt Securities, Available-for-sale [Line Items]
Marketable securities	0	0
Level 1 | U.S. Agency notes and bonds – fixed rate
Debt Securities, Available-for-sale [Line Items]
Marketable securities	0	0
Level 1 | Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Marketable securities	0	0
Level 1 | SBA loan pools – variable rate
Debt Securities, Available-for-sale [Line Items]
Marketable securities	0	0
Level 1 | Short-term cash investments
Debt Securities, Available-for-sale [Line Items]
Marketable securities	0	0
Level 2
Debt Securities, Available-for-sale [Line Items]
Marketable securities	4,528,072	4,672,476
Level 2 | U.S. Treasury notes and bonds
Debt Securities, Available-for-sale [Line Items]
Marketable securities	0	0
Level 2 | U.S. Agency issued mortgage-backed securities – variable rate
Debt Securities, Available-for-sale [Line Items]
Marketable securities	0	3,539,102
Level 2 | U.S. Agency notes and bonds – fixed rate
Debt Securities, Available-for-sale [Line Items]
Marketable securities	0	198,293
Level 2 | Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Marketable securities	2,506,006	0
Level 2 | SBA loan pools – variable rate
Debt Securities, Available-for-sale [Line Items]
Marketable securities	0	935,081
Level 2 | Short-term cash investments
Debt Securities, Available-for-sale [Line Items]
Marketable securities	$ 2,022,066	$ 0

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.4)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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