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Common Stock and Preferred Stock - Additional Information (Detail) |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
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Jul. 09, 2020 $ / shares | Aug. 09, 2019 USD ($) $ / shares shares | Jan. 01, 2019 shares | Jun. 30, 2020 USD ($) $ / shares shares | Jan. 31, 2020 USD ($) ExecutiveOfficers shares | Aug. 31, 2019 shares | Jan. 31, 2019 USD ($) ExecutiveOfficers director shares | Jun. 30, 2014 USD ($) $ / shares shares | Jun. 30, 2020 USD ($) $ / shares shares | Mar. 31, 2020 USD ($) ExecutiveOfficers shares | Jun. 30, 2019 USD ($) shares | Mar. 31, 2019 USD ($) shares | Jun. 30, 2020 USD ($) $ / shares shares | Jun. 30, 2019 USD ($) | Dec. 31, 2019 USD ($) $ / shares shares
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  |  |  | $ 0.001 |  |  |  |  | $ 0.001 |  |  |  | $ 0.001 |  | $ 0.001
Shares vested | shares |  |  |  |  |  |  | 16,417 |  |  |  |  |  |  |  |  |
Common stock issued in the period (in shares) | shares |  |  | 585,300 |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock grants |  |  | $ 4,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends |  |  |  |  |  |  |  |  |  | $ 0 |  | $ 0 |  | $ 0 | $ 0 |
Preferred stock, shares issued (in shares) | shares |  |  | 200,000 |  | 200,000 |  |  |  |  | 200,000 |  |  |  | 200,000 |  | 200,000
Preferred stock, par value (in dollars per share) | $ / shares |  |  | $ 0.001 |  | $ 0.001 |  |  |  |  | $ 0.001 |  |  |  | $ 0.001 |  | $ 0.001
Preferred shares outstanding (in shares) | shares |  |  |  |  | 200,000 |  |  |  |  | 200,000 |  |  |  | 200,000 |  | 200,000
Initial value per share (in dollars per share) | $ / shares |  |  | $ 100 |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock quarterly dividend rate |  |  |  |  |  |  |  |  |  | 6.00% |  |  |  |  |  |
Preferred stock dividend |  |  |  |  |  |  |  |  |  | $ 312,000 |  | $ 0 |  | $ 619,000 | 0 |
Number of shares outstanding in which, one director may be elected | shares |  |  | 50,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Voting percentage required to change number of directors |  |  | 80.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Payment-in-kind interest |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,277,000 | $ 0 |
Conversion of convertible senior notes | [1] |  |  |  |  |  |  |  |  | 9,473,000 |  |  |  |  |  |
3.25% Convertible Senior Notes (due 2020) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt converted, amount |  |  |  |  | $ 7,100,000 |  |  |  |  |  |  |  |  |  |  |
Payment-in-kind interest |  |  |  |  | 200,000 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  | $ 0.001 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock split conversion ratio |  | 0.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares vested (in shares) | shares |  |  |  |  |  | 10,936 |  |  |  |  |  |  |  | 69,440 |  |
Value of shares surrendered |  |  |  |  |  |  |  |  |  | $ 163,000 | $ 270,000 |  |  |  |  |
Stock forfeited (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 26,214 |  |  |  |  |
Executive officer |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock issued (in shares) | shares |  |  |  |  |  |  |  | 306,122 |  |  |  |  |  |  |  |
Restricted stock issued, value |  |  |  |  |  |  |  | $ 4,500,000 |  |  |  |  |  |  |  |
Number of executive officers | ExecutiveOfficers |  |  |  |  |  |  |  | 2 |  |  | 2 |  |  |  |  |
Executive officer | Restricted Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock issued (in shares) | shares |  |  |  |  |  | 70,421 |  |  |  |  |  |  |  |  |  |
Restricted stock issued, value |  |  |  |  |  | $ 700,000 |  |  |  |  |  |  |  |  |  |
Number of executive officers | ExecutiveOfficers |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |
Shares surrendered (in shares) | shares |  |  |  |  |  |  |  |  |  |  | 16,640 | 2,428 | 16,670 |  |  |
Value of shares surrendered |  |  |  |  |  |  |  |  |  |  | $ 172,000 | $ 25,000 | $ 249,000 |  |  |
Vesting period |  |  |  |  |  | 4 years |  |  |  |  |  |  |  |  |  |
Non-employee directors |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock issued (in shares) | shares |  |  |  |  |  |  |  | 32,823 |  |  |  |  |  |  |  |
Restricted stock issued, value |  |  |  |  |  |  |  | $ 500,000 |  |  |  |  |  |  |  |
Number of non-employee directors | director |  |  |  |  |  |  |  | 6 |  |  |  |  |  |  |  |
Non-employee directors | Restricted Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock issued (in shares) | shares |  |  |  | 5,470 |  |  |  |  |  |  |  |  |  |  |  |
Employee | Restricted Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares surrendered (in shares) | shares |  |  |  |  |  |  |  |  |  | 246 |  |  |  |  |  |
Value of shares surrendered |  |  |  |  |  |  |  |  |  | $ 1,526 |  |  |  |  |  |
Redeemable Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |
Dividends payable |  |  |  |  | 1,100,000 |  |  |  |  | 1,100,000 |  |  |  | $ 1,100,000 |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, liquidation preference percent |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum | Restricted Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, liquidation preference percent |  |  | 150.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum | Restricted Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |
Fair Value Measurements, Recurring | Redeemable Preferred Stock | Level 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated fair value of liability |  |  | $ 4,900,000 |  | $ 3,164,000 |  |  |  |  | 3,164,000 |  |  |  | $ 3,164,000 |  | $ 5,247,000
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchased (in shares) | shares |  |  |  |  |  |  |  |  | 311,284 |  |  |  |  |  |  |
Share price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 77.10 |  |  |  |  |  |  |
Stock repurchased |  |  |  |  |  |  |  |  | $ 24,000,000.0 |  |  |  |  |  |  |
Conversion of convertible senior notes | [1] |  |  |  |  |  |  |  |  | $ 1,000 |  |  |  |  |  |
Common Stock | 3.25% Convertible Senior Notes (due 2020) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument shares common stock issued upon conversion (in shares) | shares |  |  |  |  | 710,100 |  |  |  |  |  |  |  |  |  |  |
Conversion of convertible senior notes |  |  |  |  | $ 9,500,000 |  |  |  |  |  |  |  |  |  |  |
[1] | After giving effect to a 1 for 10 reverse stock split effective July 9, 2020.

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