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Capital Notes (Narrative) (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 03, 2015 | Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2015 | Jan. 25, 2017
Debt Instrument [Line Items] |  |  |  |  |
Proceeds used to pay off debt |  |  | $ 10,000,000 |  |
Capital note proceeds |  | $ 5,000,000 |  |  |
Common Stock Private Placement [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Private placement transaction date |  | Dec. 03, 2015 |  |  |
Gross proceeds from private placement issuance | $ 11,520,000 |  |  |  |
Shares issued in private placement sale | 1,000,000 |  |  |  |
Price per share in private placement sale | $ 11.52 |  |  |  |
2012 Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument Prepay Date |  | Jan. 05, 2016 |  |  |
Capital Notes 6% Due 4/1/2017 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Capital notes, interest rate |  |  | 6.00% |  |
Capital notes, maturity date |  |  | Apr. 01, 2017 |  |
Capital Notes 6% Due 4/1/2017 [Member] | 2012 Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Proceeds used to pay off debt |  |  |  | $ 10,000,000 |
Capital note issued |  |  |  | $ 10,000,000 |
Capital notes, interest rate |  |  |  | 6.00% |
Capital Notes 4% Due 1/24/2022 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Capital notes, interest rate |  | 4.00% |  |  |
Capital notes, maturity date |  | Jan. 24, 2022 |  |  |
Capital Notes 4% Due 1/24/2022 [Member] | 2017 Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Capital note issued |  |  |  |  | $ 5,000,000
Capital notes, interest rate |  |  |  |  | 4.00%
Capital notes, maturity date |  | Jan. 24, 2022 |  |  |
Duration of written notice to holders |  | 30 days |  |  |
Capital Notes 4% Due 1/24/2022 [Member] | Equity Capital [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Capital note proceeds |  | $ 3,000,000 |  |  |
Capital Notes 4% Due 1/24/2022 [Member] | Debt Services [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Capital note proceeds |  | $ 2,000,000 |  |  |

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