Stockholders' Equity - Additional information (Details)	1 Months Ended					3 Months Ended			12 Months Ended
	Apr. 30, 2020 shares	Mar. 31, 2020 USD ($) $ / shares shares		Feb. 29, 2020 USD ($) $ / shares shares	Jan. 31, 2020 USD ($) $ / shares shares	Mar. 31, 2020 USD ($) $ / shares shares		Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($) item $ / shares shares	Dec. 31, 2016 USD ($)
Capital Stock Shares authorized		120,000,000				120,000,000
Common Stock, Shares Authorized		79,999,997				79,999,997			79,999,997
Common Stock, Par or Stated Value Per Share | $ / shares		$ 0.01				$ 0.01			$ 0.01
Preferred Stock, Shares Authorized		2				2			2
Preferred Stock, Par or Stated Value Per Share | $ / shares		$ 0.01				$ 0.01			$ 0.01
Special Stock, Shares Authorized		1				1			1
Special Stock, Par or Stated Value Per Share | $ / shares		$ 0.01				$ 0.01			$ 0.01
Common Stock, Shares, Issued		38,239,621				38,239,621			37,612,465
Common Stock, Shares, Outstanding		32,237,528				32,237,528			31,881,961
Warrants, term									10 years
Warrants to purchase common stock issued (in shares)									7,179,000
Warrants, Exercise Price (in dollars per share) | $ / shares									$ 6.50
Threshold minimum beneficial ownership (as a percent)									5.00%
Threshold maximum percentage of issued and outstanding common stock, after exercise of warrants (as a percent)									19.90%
Fair Value Adjustment of Warrants | $						$ (1,200,000)		$ 0
Number of board members who can be appointed by the warrant holder | item									1
Preemptive rights period									5 years
Stock repurchase program, authorized amount | $									$ 5,000,000
Stock repurchase program, settled shares outstanding (in shares)						7,500
Stock repurchase program, shares repurchased (in shares)		72,214		0	1,500	73,714	[1],[2]
Stock repurchase program, shares repurchased, amount | $						$ 4,700,000
Stock Repurchase Program, Average Price Per Share | $ / shares		$ 1.71		$ 0.00	$ 3.27	$ 1.74	[1]
Stock Issued During Period, Value, Issued for Services | $						$ 600,000			$ 1,800,000
Stock Repurchased During Period Value Yet To Be Purchased | $		$ 4,736,220	[1],[3]	$ 4,851,330	$ 4,851,330	$ 4,736,220	[1],[3]
Common Stock [Member]
Stock repurchase program, shares repurchased (in shares)						115,608
Stock repurchase program, shares repurchased, amount | $						$ 264,000
Stock Repurchase Program, Average Price Per Share | $ / shares						$ 2.28
Stock Issued During Period, Value, Issued for Services | $						$ 2,000
Share Repurchase in Open Market [Member]
Stock repurchase program, shares repurchased (in shares)	11,279					66,214
At-The-Market Equity Offering Program [Member]
Stock Issuance Program, Maximum Amount Authorized | $										$ 12,000,000
Blank Check Preferred Stock [Member]
Preferred Stock, Shares Authorized		40,000,000				40,000,000			40,000,000
Preferred Stock, Par or Stated Value Per Share | $ / shares		$ 0.01				$ 0.01			$ 0.01

[1] In December 2019, our Board of Directors approved a share repurchase program under which we can purchase up to $5.0 million of shares of our common stock. Repurchases under the share repurchase program may be made through open market or privately negotiated transactions at times and on such terms and in such amounts as management deems appropriate, subject to market conditions, regulatory requirements and other factors. The share repurchase program is subject to the terms of our Corporate Credit Facility and does not obligate the Company to repurchase any particular amount of common stock, and may be suspended or discontinued at any time without notice.

[2] Includes an aggregate of (i) 7,500 shares purchased by affiliated purchasers of the Company and (ii) 66,214 shares purchased by the Company in the open market under its share repurchase program, 11,279 of which were purchased by the Company in March 2020 and settled in April 2020, which shares are included in net shares outstanding at March 31, 2020.

[3] Since inception of the share repurchase program through March 31, 2020, the Company has repurchased 115,608 shares of common stock for approximately $264,000, or an average price per share of $2.28. As of March 31, 2020, approximately $4.7 million of shares remained available for purchase under the share repurchase program, subject to the terms of our Corporate Credit Facility.