Series A Preferred Shares - Additional Information (Detail) - Series A Preferred Shares [Member]				3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($) shares	Jul. 02, 2019 shares	Nov. 04, 2016 USD ($) Director $ / shares shares	Sep. 30, 2019 USD ($) shares	Sep. 30, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares
Redeemable Noncontrolling Interest [Line Items]
Preferred shares, outstanding	921,000			921,000	921,000	921,000
Preferred shares, value | $	$ 21,300,000			$ 21,300,000	$ 21,300,000	$ 21,300,000
Preferred stock, dividend rate, percentage					12.00%
Convertible preferred stock, terms of conversion					each Series A Preferred Share may be converted at any time, at the option of the holder, into 45.754 common shares (which is equal to an initial conversion price of approximately $1.0928 per common share and is subject to customary adjustments for stock splits, stock dividends, recapitalizations, or other fundamental changes)
Convertible preferred shares issued upon conversion			45.754
Conversion of stock, per share | $ / shares			$ 1.0928
Preferred stock redemption period end date			Nov. 04, 2024
Preferred stock redemption period start date			Nov. 04, 2020
Maximum closing sale price of common shares on conversion price			150.00%
Preferred stock, redemption description					At any time on or after November 4, 2020, we may redeem all or a portion of the Series A Preferred Shares at the redemption prices listed below (expressed as a percentage of the liquidation preference amount per share) plus accrued and unpaid dividends to the date of redemption, if the closing sale price of the common shares equals or exceeds 150% of the conversion price then in effect for at least 10 trading days (whether or not consecutive) in a period of 20 consecutive trading days, including the last trading day of such 20 trading day period, ending on, and including, the trading day immediately preceding the business day on which we issue a notice of optional redemption.
Change in control, offering redemption period			120 days
Preferred stock, dividend payment terms					Dividends on the Series A Preferred Shares are payable quarterly at our election in cash, common shares, or a combination of cash and common shares at an annual dividend rate of 12.0% of the liquidation preference if paid all in cash or 16.0% of the liquidation preference if paid in common shares. If paid partially in cash and partially in common shares, the dividend rate on the cash portion is 12.0%, and the dividend rate on the common share portion is 16.0%.
Dividend payment description					Dividends are payable quarterly on March 31, June 30, September 30, and December 31 of each year.
Preferred stock accrued dividends | $				$ 1,800,000	$ 5,100,000
Aggregate number of common shares issued to preferred share holders as payment of dividend	2,664,164	2,321,568			4,985,732
Preferred stock voting rights			no voting rights		no voting rights
Certificate of designation description					The Certificate of Designation also provides that without the approval of the holders of a majority of the outstanding Series A Preferred Shares, we will not issue indebtedness for money borrowed or other securities which are senior to the Series A Preferred Shares in excess of the greater of (i) $100 million or (ii) 35% of our PV-10 of proved reserves as disclosed in our most recent independent reserve report filed or furnished by us on EDGAR.
Maximum amount of indebtedness for borrowed money allowed under certificate of designation | $			$ 100,000,000
PV10 reserve value percentage			35.00%
Maximum [Member]
Redeemable Noncontrolling Interest [Line Items]
Right to elect number of directors | Director			2
Minimum [Member]
Redeemable Noncontrolling Interest [Line Items]
Right to elect number of directors | Director			1
Two Director [Member]
Redeemable Noncontrolling Interest [Line Items]
Preferred shares, outstanding			400,000
One Director [Member] | Maximum [Member]
Redeemable Noncontrolling Interest [Line Items]
Preferred shares, outstanding			80,000
One Director [Member] | Minimum [Member]
Redeemable Noncontrolling Interest [Line Items]
Preferred shares, outstanding			399,999
Dividend Paid in Cash [Member]
Redeemable Noncontrolling Interest [Line Items]
Preferred stock, dividend rate, percentage			12.00%
Dividend Paid in Common Shares [Member]
Redeemable Noncontrolling Interest [Line Items]
Preferred stock, dividend rate, percentage			16.00%
Related Party [Member]
Redeemable Noncontrolling Interest [Line Items]
Preferred shares, outstanding	495,000			495,000	495,000	495,000
Preferred shares, value | $	$ 24,750,000			$ 24,750,000	$ 24,750,000	$ 24,750,000