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Series B Mandatorily Redeemable Preferred Stock (Detail) - USD ($) | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
May 31, 2017 | Mar. 31, 2017 | Aug. 31, 2016 | Jul. 31, 2016 | Jun. 30, 2016 | Aug. 31, 2014 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2015
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  | $ 3,311,421 | $ 3,501,199 | $ 6,627,617 | $ 6,864,243 | $ 13,531,337 | $ 10,774,660
Total unamortized deferred stock costs |  |  |  |  |  |  |  |  |  |  | 1,942,000 | $ 2,052,000
Preferred stock extend redemption date |  |  |  |  |  |  |  |  | Aug. 01, 2019 |  |  |
Preferred stock redemption extension fee paid |  |  |  |  |  |  |  |  | $ 153,500 |  |  |
Scheduled payments due in 2017 |  |  |  |  |  |  |  |  |  |  | $ 32,700,000 |
Preferred stock, redemption date |  |  |  |  |  |  |  |  |  |  | Aug. 01, 2017 |
Redeemable Convertible Preferred Stock Series B [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock shares issued (in shares) |  |  |  |  |  |  | 30,700 |  | 30,700 |  | 32,700 | 35,000
Preferred stock, par or stated value (in dollars per share) |  |  |  |  |  |  | $ 0.01 |  | $ 0.01 |  | $ 0.01 | $ 0.01
Liquidation preference per share (in dollars per share) |  |  |  |  |  |  | $ 1,000 |  | $ 1,000 |  | $ 1,000 | $ 1,000
Financial Instruments Subject to Mandatory Redemption, Return On Funds Invested |  |  |  |  |  |  | 14.00% |  | 14.00% |  | 14.00% |
Deferred financing costs |  |  |  |  |  |  | $ 3,100,000 |  | $ 3,100,000 |  | $ 3,100,000 |
Interest expense |  |  |  |  |  |  |  |  | 507,000 | $ 507,000 | 1,014,000 | $ 952,000
Total unamortized deferred stock costs |  |  |  |  |  |  | $ 237,000 |  | 237,000 |  | $ 592,000 | $ 1,600,000
Number of shares redeemed | 1,000 | 1,000 | 1,000 | 1,000 | 300 |  |  |  |  |  | 2,300 |
Number of shares redeemed, value |  |  |  |  |  |  |  |  | $ 2,000,000 |  | $ 2,300,000 |
Preferred stock shares outstanding (in shares) |  |  |  |  |  |  | 30,700 |  | 30,700 |  | 32,700 | 35,000
Proceeds from private placement offering |  |  |  |  |  | $ 40,000,000 |  |  |  |  |  |
Financial Instruments Subject to Mandatory Redemption, Monthly Payout, Percent |  |  |  |  |  |  |  |  |  |  | 10.00% |
Financial Instruments Subject to Mandatory Redemption, Monthly Percent Accrued |  |  |  |  |  |  |  |  |  |  | 4.00% |

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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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