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Stockholders' Equity - Additional Information (Details) - USD ($)																					12 Months Ended
	Apr. 01, 2021	Oct. 31, 2019	Oct. 01, 2019	Sep. 01, 2019	Jul. 18, 2019	May 01, 2019	Apr. 15, 2019	Apr. 01, 2019	Mar. 15, 2019	Mar. 13, 2019	Feb. 27, 2019	Jan. 01, 2019	Nov. 21, 2018	Oct. 15, 2018	Jun. 05, 2018	May 31, 2018	Apr. 03, 2018	Apr. 02, 2018	Mar. 30, 2018	Mar. 14, 2018	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized number of shares																					51,000,000
Number of common stock shares authorized																					50,000,000	50,000,000
Authorized number of shares of preferred stock																					1,000,000	1,000,000
Stock options granted (in shares)																					4,263,000
Exercise price of options grants (in dollars per share)																					$ 1.84
Percentage of options vested					33.33%
Shares issuable under warrants (in shares)					115,000
Warrants outstanding, exercise price (in dollars per share)					$ 3.17
Five year expiration
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period																					5 years
Seven year expiration
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period																					7 years
Ten year expiration
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period																					10 years
Equity Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to stock options																					$ 500,000	$ 1,100,000
Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)													35,000	15,000					50,000
Exercise price of options grants (in dollars per share)													$ 2.25	$ 2.04					$ 5.50
Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number																					0
Chief Financial Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number																					0
Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number																					0
Non Management Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)																		150,000
Exercise price of options grants (in dollars per share)																		$ 3.00
Warrant [Member] \| Five year expiration
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period																					5 years
Warrant [Member] \| Seven year expiration
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period																					7 years
Warrant [Member] \| Ten year expiration
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period																					10 years
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost expected to be recognized																					$ 100,000
Weighted average period																					1 year 26 days
Shares of restricted stock grants vested																					289,587
Compensation expense related to restricted stock																					$ 500,000	700,000
Restricted Stock [Member] \| Non Management Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested	50.00%							50.00%
Award vesting period (in years)								2 years										2 years
Aggregate shares of restricted stock granted								60,000										48,000
Restricted Stock [Member] \| Non Management Directors [Member] \| Half of the shares will vest on April 2, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested																		50.00%
Restricted Stock [Member] \| Non Management Directors [Member] \| Half of the shares will vest on April 2, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested																		50.00%
Restricted Stock [Member] \| Non-Executive Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares of restricted stock granted																1,664	25,599			90,209
Restricted Stock [Member] \| Non-Executive Management [Member] \| Vested immediately on March 14, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested																				100.00%
Restricted Stock [Member] \| Non-Executive Management [Member] \| Vested immediately on April 3, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested																	100.00%
Restricted Stock [Member] \| Non-Executive Management [Member] \| Vested immediately on May 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested																100.00%
Restricted Stock [Member] \| Consultant 1 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares of restricted stock granted															7,000
Restricted Stock [Member] \| Consultant 1 [Member] \| Vested immediately on June 5, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested															100.00%
Restricted Stock [Member] \| Consultant 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares of restricted stock granted														10,000
Restricted Stock [Member] \| Consultant 2 [Member] \| Vested immediately on October 15, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested														100.00%
Restricted Stock [Member] \| Consultant 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares of restricted stock granted														8,334
Restricted Stock [Member] \| Consultant 3 [Member] \| Vested immediately on October 15, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested														100.00%
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost expected to be recognized																						$ 300,000
Weighted average period																						1 year 11 months 16 days
Employee Stock Option [Member] \| Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)		10,000	100,000	15,000		10,000	24,000		50,000			250,000
Exercise price of options grants (in dollars per share)		$ 1.72	$ 1.77	$ 1.59		$ 1.38	$ 1.40		$ 5.50			$ 3.00
Percentage of options vested		33.33%	33.33%	33.33%		50.00%	50.00%	50.00%
Employee Stock Option [Member] \| Key Employees [Member] \| All options vested immediately on March 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested																			100.00%
Employee Stock Option [Member] \| Key Employees [Member] \| One-third of the options will vest on October 15, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested														33.33%
Employee Stock Option [Member] \| Key Employees [Member] \| One-third of the options will vest on October 15, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested														33.33%
Employee Stock Option [Member] \| Key Employees [Member] \| One-third of the options will vest on October 15, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested														33.33%
Employee Stock Option [Member] \| Key Employees [Member] \| Half of the options will vest on September 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested													50.00%
Employee Stock Option [Member] \| Key Employees [Member] \| Half of the options will vest on September 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested													50.00%
Employee Stock Option [Member] \| Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)											2,578,947
Exercise price of options grants (in dollars per share)											$ 1.70
Target Prices, lower range (in dollars per share)											$ 5.00
Number of trading days											10 days
Employee Stock Option [Member] \| Chief Executive Officer [Member] \| $3.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Option Shares Vesting											736,842
Target Prices, lower range (in dollars per share)											$ 3.00
Employee Stock Option [Member] \| Chief Executive Officer [Member] \| $5.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Option Shares Vesting											626,316
Employee Stock Option [Member] \| Chief Executive Officer [Member] \| $7.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Option Shares Vesting											515,789
Target Prices, lower range (in dollars per share)											$ 7.00
Employee Stock Option [Member] \| Chief Executive Officer [Member] \| $9.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Option Shares Vesting											405,263
Target Prices, lower range (in dollars per share)											$ 9.00
Employee Stock Option [Member] \| Chief Executive Officer [Member] \| $11.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Option Shares Vesting											294,737
Target Prices, lower range (in dollars per share)											$ 11.00
Employee Stock Option [Member] \| Chief Financial Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)											552,632
Exercise price of options grants (in dollars per share)											$ 1.70
Target Prices, lower range (in dollars per share)											$ 3.00
Number of trading days											10 days
Employee Stock Option [Member] \| Chief Financial Officer [Member] \| $3.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Option Shares Vesting											157,895
Employee Stock Option [Member] \| Chief Financial Officer [Member] \| $5.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Option Shares Vesting											134,211
Target Prices, lower range (in dollars per share)											$ 5.00
Employee Stock Option [Member] \| Chief Financial Officer [Member] \| $7.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Option Shares Vesting											110,526
Target Prices, lower range (in dollars per share)											$ 7.00
Employee Stock Option [Member] \| Chief Financial Officer [Member] \| $9.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Option Shares Vesting											86,842
Target Prices, lower range (in dollars per share)											$ 9.00
Employee Stock Option [Member] \| Chief Financial Officer [Member] \| $11.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Option Shares Vesting											63,158
Target Prices, lower range (in dollars per share)											$ 11.00
Employee Stock Option [Member] \| Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)											368,421
Exercise price of options grants (in dollars per share)											$ 1.70
Number of trading days											10 days
Employee Stock Option [Member] \| Officer [Member] \| $3.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Option Shares Vesting											105,263
Target Prices, lower range (in dollars per share)											$ 3.00
Employee Stock Option [Member] \| Officer [Member] \| $5.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Option Shares Vesting											89,474
Target Prices, lower range (in dollars per share)											$ 5.00
Employee Stock Option [Member] \| Officer [Member] \| $7.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Option Shares Vesting											73,684
Target Prices, lower range (in dollars per share)											$ 7.00
Employee Stock Option [Member] \| Officer [Member] \| $9.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Option Shares Vesting											57,895
Target Prices, lower range (in dollars per share)											$ 9.00
Employee Stock Option [Member] \| Officer [Member] \| $11.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Option Shares Vesting											42,105
Target Prices, lower range (in dollars per share)											$ 11.00
Employee Stock Option [Member] \| Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)										154,000
Exercise price of options grants (in dollars per share)										$ 1.73
Employee Stock Option [Member] \| Non Management Directors [Member] \| Half of the options will vest on April 2, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested																		50.00%
Employee Stock Option [Member] \| Non Management Directors [Member] \| Half of the options will vest on April 2, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of options vested																		50.00%
Employee Stock Option [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)								150,000
Exercise price of options grants (in dollars per share)								$ 1.70
2011 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock eligible for issuance																					13,000,000
Shares of common stock available for issuance																					1,900,793
Shares of common stock reserved for issuance																					9,703,233
Performance Shares [Member] \| Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance stock bonus																					$ 90,000
Term of employment											2 years
Warrant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense																					$ 14,000	$ 0