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Bank Debt (Details Textual) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 USD ($) ft² CreditFacilities | Mar. 31, 2016 USD ($) CreditFacilities | Sep. 30, 2015 USD ($) | Sep. 30, 2010 USD ($) | Dec. 31, 2018 USD ($) CreditFacilities | Dec. 31, 2017 USD ($)
Bank Debt (Textual) |  |  |  |  |  |
Number of credit facilities | CreditFacilities |  |  |  |  | 5 |
Debt issue costs |  |  |  |  | $ 1,971 | $ 66,101
Unrestricted cash, cash equivalents and short-term investments |  |  |  |  | $ 2,000,000 |
Credit Facilities [Member] |  |  |  |  |  |
Bank Debt (Textual) |  |  |  |  |  |
Number of credit facilities | CreditFacilities | 2 | 2 |  |  |  |
Credit facility aggregate value | $ 6,500,000 | $ 4,500,000 |  |  |  |
Variable interest rate with LIBOR, description |  |  |  |  | These notes bear interest at a variable rate equal to the one-month LIBOR plus a margin of 2.25%. |
Variable interest rate |  |  |  |  | 4.60% |
Debt issue costs | 68,072 | $ 46,734 | $ 34,125 | $ 26,489 |  |
Outstanding under line of credit |  |  |  |  | $ 500,000 |
Credit Facilities One [Member] |  |  |  |  |  |
Bank Debt (Textual) |  |  |  |  |  |
Variable interest rate with LIBOR, description |  |  |  |  | This note bears interest at a variable rate equal to the one-month LIBOR plus a margin of 2.25%. |
Variable interest rate |  |  |  |  | 4.55% |
Interest rate swaps [Member] |  |  |  |  |  |
Bank Debt (Textual) |  |  |  |  |  |
Variable interest rate with LIBOR, description |  |  |  |  | Interest rate exposures on Loan #1 and Loan #2 with interest rate swap agreements that effectively converted floating interest rates based on the one-month LIBOR plus a margin of 3.25% and 2.25% to the fixed rates of 6.04% and 4.38%, respectively. As of December 31, 2018, the variable rates on these two mortgage notes were 5.68% and 4.73%, respectively. |
Original notional amount |  |  |  |  | $ 2,796,372 |
Interest rate swaps [Member] | Loan One [Member] |  |  |  |  |  |
Bank Debt (Textual) |  |  |  |  |  |
Variable interest rate |  |  |  |  | 5.68% |
Original notional amount |  |  |  |  | $ 1,000,000 |
Interest rate swaps [Member] | Mortgage Loan Two [Member] |  |  |  |  |  |
Bank Debt (Textual) |  |  |  |  |  |
Variable interest rate |  |  |  |  | 4.73% |
Original notional amount |  |  |  |  | $ 2,500,000 |
TD Bank N.A. [Member] | Loan One [Member] |  |  |  |  |  |
Bank Debt (Textual) |  |  |  |  |  |
Maximum limit on issuance of loan, rate |  |  |  | 80.00% |  |
Proceeds from issuance of loan |  |  |  | $ 1,000,000 |  |
Interest payments, term |  |  |  | 10 years |  |
Loan amortization, term |  |  |  | 15 years |  |
Balloon principal payment |  |  |  | $ 451,885 |  |
Balloon principal payment due, description |  |  |  | Due during the third quarter of 2020. |  |
Outstanding amount of loan |  |  |  |  | 562,604 |
TD Bank N.A. [Member] | Mortgage Loan Two [Member] |  |  |  |  |  |
Bank Debt (Textual) |  |  |  |  |  |
Proceeds from issuance of loan |  |  | $ 2,500,000 |  |  |
Interest payments, term |  |  | 10 years |  |  |
Loan amortization, term |  |  | 20 years |  |  |
Balloon principal payment |  |  | $ 1,550,000 |  |  |
Balloon principal payment due, description |  |  | Due during the third quarter of 2025. |  |  |
Outstanding amount of loan |  |  |  |  | $ 2,233,768 |
TD Bank N.A. [Member] | Construction Loan Three [Member] |  |  |  |  |  |
Bank Debt (Textual) |  |  |  |  |  |
Maximum limit on issuance of loan, rate |  |  |  |  | 80.00% |
Proceeds from issuance of loan |  |  |  |  | $ 3,799,286 |
Loan amortization, term |  |  |  |  | 7 years |
Outstanding amount of loan |  |  |  |  | $ 3,940,000 |
Variable interest rate with LIBOR, description |  |  |  |  | Variable rate equal to the one-month LIBOR (adjusted at each monthly payment date) plus a margin of 2.25% through September 2018, at which time the loan converted to a seven-year term loan facility at the same variable interest rate (which was equal to 4.60% as of December 31, 2018). |
Loan conversion, term |  |  |  |  | 7 years |
TD Bank N.A. [Member] | Construction Loan Four [Member] |  |  |  |  |  |
Bank Debt (Textual) |  |  |  |  |  |
Maximum limit on issuance of loan, description |  |  |  |  | Not to exceed 80% (75% prior to the 2017 amendments). |
Proceeds from issuance of loan |  |  |  |  | $ 2,560,000 |
Interest payments, term |  |  |  |  | 10 years |
Loan amortization, term |  |  |  |  | 20 years |
Balloon principal payment |  |  |  |  | $ 1,408,000 |
Balloon principal payment due, description |  |  |  |  | Due during the first quarter of 2027. |
Outstanding amount of loan |  |  |  |  | $ 2,464,000 |
Variable interest rate with LIBOR, description |  |  |  |  | Variable rate equal to the one-month LIBOR (adjusted at each monthly payment date) plus a margin of 2.25% through March 2018, at which time the loan converted to a term loan facility at the same variable interest rate (which was equal to 4.60% as of December 31, 2018). |
TD Bank N.A. [Member] | Mortgage Loan Five [Member] |  |  |  |  |  |
Bank Debt (Textual) |  |  |  |  |  |
Proceeds from issuance of loan | $ 340,000 |  |  |  |  |
Interest payments, term | 10 years |  |  |  |  |
Loan amortization, term | 20 years |  |  |  |  |
Balloon principal payment | $ 208,000 |  |  |  |  |
Balloon principal payment due, description | Due during the first quarter of 2027. |  |  |  |  |
Outstanding amount of loan |  |  |  |  | $ 320,767 |
Variable interest rate with LIBOR, description | Variable rate equal to the one-month LIBOR (adjusted at each monthly payment date) plus a margin of 2.25% (which was equal to 4.71% as of December 31, 2018). |  |  |  |  |
Warehouse and storage facility | ft² | 4,114 |  |  |  |  |
TD Bank N.A. [Member] | Credit Facilities [Member] |  |  |  |  |  |
Bank Debt (Textual) |  |  |  |  |  |
Credit facility aggregate value |  |  |  | $ 500,000 |  |
Variable interest rate with LIBOR, description |  |  |  | Interest on borrowings against the line of credit is variable at the higher of 4.25% per annum or the one-month LIBOR plus 3.5% per annum. |  |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: 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(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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