Fair Value Measurements - Valuation Assumptions (Details) - Recurring - Level 3	Jun. 30, 2022 Y
Stock price volatility | PHC Option
Fair value valuation assumptions
Embedded Derivative Liability, Measurement Input	107.0
Probabilities of conversion provisions | Minimum | PHC Option
Fair value valuation assumptions
Embedded Derivative Liability, Measurement Input	5.0
Probabilities of conversion provisions | Maximum | PHC Option
Fair value valuation assumptions
Embedded Derivative Liability, Measurement Input	10.0
Time period until maturity (yrs) | PHC Option
Fair value valuation assumptions
Embedded Derivative Liability, Measurement Input	0.50
PHC Notes | Stock price volatility
Fair value valuation assumptions
Embedded Derivative Liability, Measurement Input	113.0
PHC Notes | Probabilities of conversion provisions | Minimum
Fair value valuation assumptions
Embedded Derivative Liability, Measurement Input	5.0
PHC Notes | Probabilities of conversion provisions | Maximum
Fair value valuation assumptions
Embedded Derivative Liability, Measurement Input	10.0
PHC Notes | Time period until maturity (yrs)
Fair value valuation assumptions
Embedded Derivative Liability, Measurement Input	2.34
Energy Capital Facility | Stock price volatility
Fair value valuation assumptions
Embedded Derivative Liability, Measurement Input	97.0
Energy Capital Facility | Probabilities of conversion provisions | Minimum
Fair value valuation assumptions
Embedded Derivative Liability, Measurement Input	5.0
Energy Capital Facility | Probabilities of conversion provisions | Maximum
Fair value valuation assumptions
Embedded Derivative Liability, Measurement Input	10.0
Energy Capital Facility | Time period until maturity (yrs) | Minimum
Fair value valuation assumptions
Embedded Derivative Liability, Measurement Input	0.00
Energy Capital Facility | Time period until maturity (yrs) | Maximum
Fair value valuation assumptions
Embedded Derivative Liability, Measurement Input	0.36